56515238400 has 120 divisors (see below), whose sum is σ = 186694684704. Its totient is φ = 15070720000.

The previous prime is 56515238363. The next prime is 56515238401. The reversal of 56515238400 is 483251565.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (56515238401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697476 + ... + 774275.

Almost surely, 2^56515238400 is an apocalyptic number.

56515238400 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

56515238400 is an abundant number, since it is smaller than the sum of its proper divisors (130179446304).

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

56515238400 is a wasteful number, since it uses less digits than its factorization.

56515238400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471782 (or 1471761 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 39.

Adding to 56515238400 its reverse (483251565), we get a palindrome (56998489965).

The spelling of 56515238400 in words is "fifty-six billion, five hundred fifteen million, two hundred thirty-eight thousand, four hundred".