521574801672 has 32 divisors (see below), whose sum is σ = 1303976868480. Its totient is φ = 173852952000.

The previous prime is 521574801653. The next prime is 521574801733. The reversal of 521574801672 is 276108475125.

It is a super-2 number, since 2×521574801672² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 513073 + ... + 1142975.

It is an arithmetic number, because the mean of its divisors is an integer number (40749277140).

Almost surely, 2^521574801672 is an apocalyptic number.

It is an amenable number.

521574801672 is an abundant number, since it is smaller than the sum of its proper divisors (782402066808).

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

521574801672 is a wasteful number, since it uses less digits than its factorization.

521574801672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664413 (or 664409 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 48.

The spelling of 521574801672 in words is "five hundred twenty-one billion, five hundred seventy-four million, eight hundred one thousand, six hundred seventy-two".