56723643898 has 32 divisors (see below), whose sum is σ = 90643069440. Its totient is φ = 26546227200.

The previous prime is 56723643877. The next prime is 56723643913. The reversal of 56723643898 is 89834632765.

It is a super-2 number, since 2×56723643898² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2172823 + ... + 2198773.

It is an arithmetic number, because the mean of its divisors is an integer number (2832595920).

Almost surely, 2^56723643898 is an apocalyptic number.

56723643898 is a deficient number, since it is larger than the sum of its proper divisors (33919425542).

56723643898 is a wasteful number, since it uses less digits than its factorization.

56723643898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26662.

The product of its digits is 52254720, while the sum is 61.

The spelling of 56723643898 in words is "fifty-six billion, seven hundred twenty-three million, six hundred forty-three thousand, eight hundred ninety-eight".