623404056520 has 32 divisors (see below), whose sum is σ = 1603039003200. Its totient is φ = 213738533568.

The previous prime is 623404056503. The next prime is 623404056521. The reversal of 623404056520 is 25650404326.

It is a self number, because there is not a number n which added to its sum of digits gives 623404056520.

It is not an unprimeable number, because it can be changed into a prime (623404056521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1113221250 + ... + 1113221809.

It is an arithmetic number, because the mean of its divisors is an integer number (50094968850).

Almost surely, 2^623404056520 is an apocalyptic number.

It is an amenable number.

623404056520 is an abundant number, since it is smaller than the sum of its proper divisors (979634946680).

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

623404056520 is a wasteful number, since it uses less digits than its factorization.

623404056520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226443077 (or 2226443073 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

The spelling of 623404056520 in words is "six hundred twenty-three billion, four hundred four million, fifty-six thousand, five hundred twenty".