λ
Sequence Observatory

6,561,918

2 × 33 × 11 × 11047
Abundant Even Composite

Starting at 6,561,918, the Collatz iteration reaches 1 after 240 steps. The first transition is 3280959; the starting value is even with 32 positive divisors.

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Prime Factor Structure

Factorization String 2 × 3^3 × 11 × 11047
Distinct Prime Factors 4
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 32
Divisor Sum (σ) 15,909,120
Proper Divisor Sum 9,347,202
Digit Sum / Digital Root 36 (Root: 9)
Adjacent Primes #6561911 ← → #6561937

Radix Representation

Decimal 6561918
Binary 11001000010000001111110 (23 bits)
Octal 0o31020176
Hexadecimal 0x64207E

Divisor Catalog (5 of 32)

1 2 3 6 9

Collatz Trajectory (240 steps to reach 1)

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

Showing the first 5 trajectory entries; the stopping-time total above is unchanged.

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