656320337828 has 12 divisors (see below), whose sum is σ = 1148630958300. Its totient is φ = 328140064032.

The previous prime is 656320337791. The next prime is 656320337899. The reversal of 656320337828 is 828733023656.

It can be written as a sum of positive squares in 2 ways, for example, as 134643495844 + 521676841984 = 366938^2 + 722272^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 656320337828.

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 3 ways as a sum of consecutive naturals, for example, 4952651 + ... + 5083442.

It is an arithmetic number, because the mean of its divisors is an integer number (95719246525).

Almost surely, 2^656320337828 is an apocalyptic number.

It is an amenable number.

656320337828 is a deficient number, since it is larger than the sum of its proper divisors (492310620472).

656320337828 is a wasteful number, since it uses less digits than its factorization.

656320337828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10052446 (or 10052444 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 53.

The spelling of 656320337828 in words is "six hundred fifty-six billion, three hundred twenty million, three hundred thirty-seven thousand, eight hundred twenty-eight".