56817638540 has 24 divisors (see below), whose sum is σ = 128495275440. Its totient is φ = 20978820288.

The previous prime is 56817638531. The next prime is 56817638543. The reversal of 56817638540 is 4583671865.

It is not an unprimeable number, because it can be changed into a prime (56817638543) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 109264430 + ... + 109264949.

It is an arithmetic number, because the mean of its divisors is an integer number (5353969810).

Almost surely, 2^56817638540 is an apocalyptic number.

It is an amenable number.

56817638540 is an abundant number, since it is smaller than the sum of its proper divisors (71677636900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

56817638540 is a wasteful number, since it uses less digits than its factorization.

56817638540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218529401 (or 218529399 counting only the distinct ones).

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 56817638540 in words is "fifty-six billion, eight hundred seventeen million, six hundred thirty-eight thousand, five hundred forty".