521476520672008 has 64 divisors (see below), whose sum is σ = 1067027070513600. Its totient is φ = 236952447621120.

The previous prime is 521476520671927. The next prime is 521476520672047. The reversal of 521476520672008 is 800276025674125.

It is a happy number.

It is a super-2 number, since 2×521476520672008² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521476520672008.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4808086516 + ... + 4808194972.

It is an arithmetic number, because the mean of its divisors is an integer number (16672297976775).

Almost surely, 2^{521476520672008} is an apocalyptic number.

It is an amenable number.

521476520672008 is an abundant number, since it is smaller than the sum of its proper divisors (545550549841592).

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

521476520672008 is a wasteful number, since it uses less digits than its factorization.

521476520672008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126950 (or 126946 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 55.

The spelling of 521476520672008 in words is "five hundred twenty-one trillion, four hundred seventy-six billion, five hundred twenty million, six hundred seventy-two thousand, eight".