646,006

2 × 323003

Starting at 646,006, the Collatz iteration reaches 1 after 53 steps. The first transition is 323003; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 323003

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 969,012

Proper Divisor Sum 323,006

Digit Sum / Digital Root 22 (Root: 4)

Adjacent Primes #646003 ← → #646013

Radix Representation

Decimal	646006
Binary	10011101101101110110 (20 bits)
Octal	0o2355566
Hexadecimal	0x9DB76

Divisor Catalog (4)

1 2 323,003 646,006

Collatz Trajectory (53 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

646,006 323,003 969,010 484,505 1,453,516 726,758 363,379 1,090,138 545,069 1,635,208 817,604 408,802 204,401 613,204 306,602 153,301 459,904 229,952 114,976 57,488 28,744 14,372 7,186 3,593 10,780 5,390 2,695 8,086 4,043 12,130 6,065 18,196 9,098 4,549 13,648 6,824 3,412 1,706 853 2,560 1,280 640 320 160 80 40 20 10 5 16 8 4 2 1

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