521453553164 has 12 divisors (see below), whose sum is σ = 913427117064. Its totient is φ = 260474376864.

The previous prime is 521453553161. The next prime is 521453553199. The reversal of 521453553164 is 461355354125.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (521453553161) 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, 63095282 + ... + 63103545.

It is an arithmetic number, because the mean of its divisors is an integer number (76118926422).

Almost surely, 2^521453553164 is an apocalyptic number.

It is an amenable number.

521453553164 is a deficient number, since it is larger than the sum of its proper divisors (391973563900).

521453553164 is a wasteful number, since it uses less digits than its factorization.

521453553164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126199864 (or 126199862 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 44.

The spelling of 521453553164 in words is "five hundred twenty-one billion, four hundred fifty-three million, five hundred fifty-three thousand, one hundred sixty-four".