8539401564 has 24 divisors (see below), whose sum is σ = 22139189520. Its totient is φ = 2846467152.

The previous prime is 8539401557. The next prime is 8539401587. The reversal of 8539401564 is 4651049358.

8539401564 is a `hidden beast` number, since 8 + 539 + 40 + 15 + 64 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39534159 + ... + 39534374.

It is an arithmetic number, because the mean of its divisors is an integer number (922466230).

Almost surely, 2^8539401564 is an apocalyptic number.

It is an amenable number.

8539401564 is an abundant number, since it is smaller than the sum of its proper divisors (13599787956).

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

8539401564 is a wasteful number, since it uses less digits than its factorization.

8539401564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79068546 (or 79068538 counting only the distinct ones).

The product of its (nonzero) digits is 518400, while the sum is 45.

The square root of 8539401564 is about 92408.8824951368. The cubic root of 8539401564 is about 2043.9760947747.

The spelling of 8539401564 in words is "eight billion, five hundred thirty-nine million, four hundred one thousand, five hundred sixty-four".