56556581642 has 32 divisors (see below), whose sum is σ = 94374154944. Its totient is φ = 25200864000.

The previous prime is 56556581623. The next prime is 56556581677. The reversal of 56556581642 is 24618565565.

It is a happy number.

It is a super-2 number, since 2×56556581642² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1380173 + ... + 1420559.

It is an arithmetic number, because the mean of its divisors is an integer number (2949192342).

Almost surely, 2^56556581642 is an apocalyptic number.

56556581642 is a deficient number, since it is larger than the sum of its proper divisors (37817573302).

56556581642 is a wasteful number, since it uses less digits than its factorization.

56556581642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41654.

The product of its digits is 8640000, while the sum is 53.

The spelling of 56556581642 in words is "fifty-six billion, five hundred fifty-six million, five hundred eighty-one thousand, six hundred forty-two".