523578322164 has 12 divisors (see below), whose sum is σ = 1221682751744. Its totient is φ = 174526107384.

The previous prime is 523578322123. The next prime is 523578322199. The reversal of 523578322164 is 461223875325.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21815763412 + ... + 21815763435.

Almost surely, 2^523578322164 is an apocalyptic number.

It is an amenable number.

523578322164 is an abundant number, since it is smaller than the sum of its proper divisors (698104429580).

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

523578322164 is a wasteful number, since it uses less digits than its factorization.

523578322164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43631526854 (or 43631526852 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The spelling of 523578322164 in words is "five hundred twenty-three billion, five hundred seventy-eight million, three hundred twenty-two thousand, one hundred sixty-four".