56556376645 has 48 divisors (see below), whose sum is σ = 73526745600. Its totient is φ = 41742033920.

The previous prime is 56556376637. The next prime is 56556376649. The reversal of 56556376645 is 54667365565.

It is not a de Polignac number, because 56556376645 - 2³ = 56556376637 is a prime.

It is a super-2 number, since 2×56556376645² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56556376645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56556376649) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 39301836 + ... + 39303274.

It is an arithmetic number, because the mean of its divisors is an integer number (1531807200).

Almost surely, 2^56556376645 is an apocalyptic number.

It is an amenable number.

56556376645 is a deficient number, since it is larger than the sum of its proper divisors (16970368955).

56556376645 is a wasteful number, since it uses less digits than its factorization.

56556376645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1998 (or 1981 counting only the distinct ones).

The product of its digits is 68040000, while the sum is 58.

The spelling of 56556376645 in words is "fifty-six billion, five hundred fifty-six million, three hundred seventy-six thousand, six hundred forty-five".