105561240656 has 10 divisors (see below), whose sum is σ = 204524903802. Its totient is φ = 52780620320.

The previous prime is 105561240643. The next prime is 105561240677. The reversal of 105561240656 is 656042165501.

It can be written as a sum of positive squares in only one way, i.e., 89649941056 + 15911299600 = 299416^2 + 126140^2 .

It is a super-2 number, since 2×105561240656² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3298788755 + ... + 3298788786.

Almost surely, 2^105561240656 is an apocalyptic number.

105561240656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

105561240656 is a deficient number, since it is larger than the sum of its proper divisors (98963663146).

105561240656 is an equidigital number, since it uses as much as digits as its factorization.

105561240656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6597577549 (or 6597577543 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 41.

The spelling of 105561240656 in words is "one hundred five billion, five hundred sixty-one million, two hundred forty thousand, six hundred fifty-six".