56178400690 has 32 divisors (see below), whose sum is σ = 102194305920. Its totient is φ = 22233014784.

The previous prime is 56178400669. The next prime is 56178400693. The reversal of 56178400690 is 9600487165.

It is a super-2 number, since 2×56178400690² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 56178400690.

It is not an unprimeable number, because it can be changed into a prime (56178400693) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4342051 + ... + 4354969.

It is an arithmetic number, because the mean of its divisors is an integer number (3193572060).

Almost surely, 2^56178400690 is an apocalyptic number.

56178400690 is a deficient number, since it is larger than the sum of its proper divisors (46015905230).

56178400690 is a wasteful number, since it uses less digits than its factorization.

56178400690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17506.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 56178400690 in words is "fifty-six billion, one hundred seventy-eight million, four hundred thousand, six hundred ninety".