161447313564 has 24 divisors (see below), whose sum is σ = 418567109520. Its totient is φ = 53815771152.

The previous prime is 161447313529. The next prime is 161447313623. The reversal of 161447313564 is 465313744161.

161447313564 is a `hidden beast` number, since 1 + 6 + 1 + 4 + 4 + 73 + 13 + 564 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 747441159 + ... + 747441374.

It is an arithmetic number, because the mean of its divisors is an integer number (17440296230).

Almost surely, 2^161447313564 is an apocalyptic number.

It is an amenable number.

161447313564 is an abundant number, since it is smaller than the sum of its proper divisors (257119795956).

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

161447313564 is a wasteful number, since it uses less digits than its factorization.

161447313564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494882546 (or 1494882538 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 161447313564 in words is "one hundred sixty-one billion, four hundred forty-seven million, three hundred thirteen thousand, five hundred sixty-four".