56644642305 has 32 divisors (see below), whose sum is σ = 105079921920. Its totient is φ = 28896975360.

The previous prime is 56644642291. The next prime is 56644642357. The reversal of 56644642305 is 50324644665.

It is a happy number.

56644642305 is a `hidden beast` number, since 566 + 4 + 4 + 64 + 23 + 0 + 5 = 666.

It is not a de Polignac number, because 56644642305 - 2¹⁰ = 56644641281 is a prime.

It is a super-2 number, since 2×56644642305² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9118416 + ... + 9124625.

It is an arithmetic number, because the mean of its divisors is an integer number (3283747560).

Almost surely, 2^56644642305 is an apocalyptic number.

It is an amenable number.

56644642305 is a deficient number, since it is larger than the sum of its proper divisors (48435279615).

56644642305 is a wasteful number, since it uses less digits than its factorization.

56644642305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18243078 (or 18243072 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 45.

The spelling of 56644642305 in words is "fifty-six billion, six hundred forty-four million, six hundred forty-two thousand, three hundred five".