521414466720 has 96 divisors (see below), whose sum is σ = 1877092092288. Its totient is φ = 119180448768.

The previous prime is 521414466719. The next prime is 521414466731. The reversal of 521414466720 is 27664414125.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×521414466720² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 77588079 + ... + 77594798.

It is an arithmetic number, because the mean of its divisors is an integer number (19553042628).

Almost surely, 2^521414466720 is an apocalyptic number.

It is an amenable number.

521414466720 is an abundant number, since it is smaller than the sum of its proper divisors (1355677625568).

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

521414466720 is a wasteful number, since it uses less digits than its factorization.

521414466720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155182902 (or 155182894 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 521414466720 in words is "five hundred twenty-one billion, four hundred fourteen million, four hundred sixty-six thousand, seven hundred twenty".