521613306364 has 12 divisors (see below), whose sum is σ = 912830804704. Its totient is φ = 260804505024.

The previous prime is 521613306353. The next prime is 521613306391. The reversal of 521613306364 is 463603316125.

It is a congruent number.

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, 90877 + ... + 1025419.

Almost surely, 2^521613306364 is an apocalyptic number.

It is an amenable number.

521613306364 is a deficient number, since it is larger than the sum of its proper divisors (391217498340).

521613306364 is a wasteful number, since it uses less digits than its factorization.

521613306364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1074084 (or 1074082 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 40.

The spelling of 521613306364 in words is "five hundred twenty-one billion, six hundred thirteen million, three hundred six thousand, three hundred sixty-four".