56518281915 has 16 divisors (see below), whose sum is σ = 94360958208. Its totient is φ = 28832514656.

The previous prime is 56518281901. The next prime is 56518281979. The reversal of 56518281915 is 51918281565.

It is a cyclic number.

It is not a de Polignac number, because 56518281915 - 2⁴ = 56518281899 is a prime.

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, 81910209 + ... + 81910898.

It is an arithmetic number, because the mean of its divisors is an integer number (5897559888).

Almost surely, 2^56518281915 is an apocalyptic number.

56518281915 is a deficient number, since it is larger than the sum of its proper divisors (37842676293).

56518281915 is a wasteful number, since it uses less digits than its factorization.

56518281915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163821138.

The product of its digits is 864000, while the sum is 51.

The spelling of 56518281915 in words is "fifty-six billion, five hundred eighteen million, two hundred eighty-one thousand, nine hundred fifteen".