56400988664 has 16 divisors (see below), whose sum is σ = 105898946400. Its totient is φ = 28161269632.

The previous prime is 56400988649. The next prime is 56400988681. The reversal of 56400988664 is 46688900465.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4896977 + ... + 4908480.

It is an arithmetic number, because the mean of its divisors is an integer number (6618684150).

Almost surely, 2^56400988664 is an apocalyptic number.

It is an amenable number.

56400988664 is a deficient number, since it is larger than the sum of its proper divisors (49497957736).

56400988664 is a wasteful number, since it uses less digits than its factorization.

56400988664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9806182 (or 9806178 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 56.

The spelling of 56400988664 in words is "fifty-six billion, four hundred million, nine hundred eighty-eight thousand, six hundred sixty-four".