56491696828 has 36 divisors (see below), whose sum is σ = 116117509872. Its totient is φ = 23975663040.

The previous prime is 56491696817. The next prime is 56491696843. The reversal of 56491696828 is 82869619465.

It is a self number, because there is not a number n which added to its sum of digits gives 56491696828.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1378953 + ... + 1419328.

Almost surely, 2^56491696828 is an apocalyptic number.

It is an amenable number.

56491696828 is an abundant number, since it is smaller than the sum of its proper divisors (59625813044).

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

56491696828 is a wasteful number, since it uses less digits than its factorization.

56491696828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2798402 (or 2798393 counting only the distinct ones).

The product of its digits is 44789760, while the sum is 64.

The spelling of 56491696828 in words is "fifty-six billion, four hundred ninety-one million, six hundred ninety-six thousand, eight hundred twenty-eight".