520997804433 has 16 divisors (see below), whose sum is σ = 779342279040. Its totient is φ = 343959713712.

The previous prime is 520997804357. The next prime is 520997804447. The reversal of 520997804433 is 334408799025.

520997804433 is a `hidden beast` number, since 52 + 0 + 99 + 78 + 0 + 4 + 433 = 666.

It is not a de Polignac number, because 520997804433 - 2⁸ = 520997804177 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 520997804433.

It is not an unprimeable number, because it can be changed into a prime (520997804233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93668166 + ... + 93673727.

It is an arithmetic number, because the mean of its divisors is an integer number (48708892440).

Almost surely, 2^520997804433 is an apocalyptic number.

It is an amenable number.

520997804433 is a deficient number, since it is larger than the sum of its proper divisors (258344474607).

520997804433 is a wasteful number, since it uses less digits than its factorization.

520997804433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187342005 (or 187341999 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 54.

The spelling of 520997804433 in words is "five hundred twenty billion, nine hundred ninety-seven million, eight hundred four thousand, four hundred thirty-three".