521454888620 has 12 divisors (see below), whose sum is σ = 1095055266144. Its totient is φ = 208581955440.

The previous prime is 521454888587. The next prime is 521454888629. The reversal of 521454888620 is 26888454125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (521454888629) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13036372196 + ... + 13036372235.

It is an arithmetic number, because the mean of its divisors is an integer number (91254605512).

Almost surely, 2^521454888620 is an apocalyptic number.

It is an amenable number.

521454888620 is an abundant number, since it is smaller than the sum of its proper divisors (573600377524).

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

521454888620 is a wasteful number, since it uses less digits than its factorization.

521454888620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26072744440 (or 26072744438 counting only the distinct ones).

The product of its (nonzero) digits is 4915200, while the sum is 53.

The spelling of 521454888620 in words is "five hundred twenty-one billion, four hundred fifty-four million, eight hundred eighty-eight thousand, six hundred twenty".