56661098655 has 32 divisors (see below), whose sum is σ = 103663563264. Its totient is φ = 25888542336.

The previous prime is 56661098639. The next prime is 56661098693. The reversal of 56661098655 is 55689016665.

It is a happy number.

It is not a de Polignac number, because 56661098655 - 2⁴ = 56661098639 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 56661098595 and 56661098604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58749 + ... + 341721.

It is an arithmetic number, because the mean of its divisors is an integer number (3239486352).

Almost surely, 2^56661098655 is an apocalyptic number.

56661098655 is a deficient number, since it is larger than the sum of its proper divisors (47002464609).

56661098655 is a wasteful number, since it uses less digits than its factorization.

56661098655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284895.

The product of its (nonzero) digits is 11664000, while the sum is 57.

The spelling of 56661098655 in words is "fifty-six billion, six hundred sixty-one million, ninety-eight thousand, six hundred fifty-five".