521540332364 has 12 divisors (see below), whose sum is σ = 925550449488. Its totient is φ = 257097346800.

The previous prime is 521540332303. The next prime is 521540332393. The reversal of 521540332364 is 463233045125.

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, 918204527 + ... + 918205094.

It is an arithmetic number, because the mean of its divisors is an integer number (77129204124).

Almost surely, 2^521540332364 is an apocalyptic number.

It is an amenable number.

521540332364 is a deficient number, since it is larger than the sum of its proper divisors (404010117124).

521540332364 is a wasteful number, since it uses less digits than its factorization.

521540332364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836409696 (or 1836409694 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 38.

Adding to 521540332364 its reverse (463233045125), we get a palindrome (984773377489).

The spelling of 521540332364 in words is "five hundred twenty-one billion, five hundred forty million, three hundred thirty-two thousand, three hundred sixty-four".