56721000930 has 32 divisors (see below), whose sum is σ = 148505894208. Its totient is φ = 13750545600.

The previous prime is 56721000911. The next prime is 56721000937. The reversal of 56721000930 is 3900012765.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a junction number, because it is equal to n+sod(n) for n = 56721000891 and 56721000900.

It is not an unprimeable number, because it can be changed into a prime (56721000937) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 85940581 + ... + 85941240.

It is an arithmetic number, because the mean of its divisors is an integer number (4640809194).

Almost surely, 2^56721000930 is an apocalyptic number.

56721000930 is an abundant number, since it is smaller than the sum of its proper divisors (91784893278).

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

56721000930 is a wasteful number, since it uses less digits than its factorization.

56721000930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171881842.

The product of its (nonzero) digits is 11340, while the sum is 33.

The spelling of 56721000930 in words is "fifty-six billion, seven hundred twenty-one million, nine hundred thirty", and thus it is an aban number.