138571564 has 12 divisors (see below), whose sum is σ = 243560800. Its totient is φ = 68982768.

The previous prime is 138571553. The next prime is 138571603. The reversal of 138571564 is 465175831.

It is a happy number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 74724 + ... + 76555.

Almost surely, 2^138571564 is an apocalyptic number.

It is an amenable number.

138571564 is a deficient number, since it is larger than the sum of its proper divisors (104989236).

138571564 is a wasteful number, since it uses less digits than its factorization.

138571564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151512 (or 151510 counting only the distinct ones).

The product of its digits is 100800, while the sum is 40.

The square root of 138571564 is about 11771.6423662971. The cubic root of 138571564 is about 517.4773826922.

The spelling of 138571564 in words is "one hundred thirty-eight million, five hundred seventy-one thousand, five hundred sixty-four".