138376564 has 6 divisors (see below), whose sum is σ = 242158994. Its totient is φ = 69188280.

The previous prime is 138376547. The next prime is 138376597. The reversal of 138376564 is 465673831.

It can be written as a sum of positive squares in only one way, i.e., 111936400 + 26440164 = 10580^2 + 5142^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 138376564.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17297067 + ... + 17297074.

Almost surely, 2^138376564 is an apocalyptic number.

It is an amenable number.

138376564 is a deficient number, since it is larger than the sum of its proper divisors (103782430).

138376564 is a wasteful number, since it uses less digits than its factorization.

138376564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34594145 (or 34594143 counting only the distinct ones).

The product of its digits is 362880, while the sum is 43.

The square root of 138376564 is about 11763.3568338294. The cubic root of 138376564 is about 517.2345347445.

The spelling of 138376564 in words is "one hundred thirty-eight million, three hundred seventy-six thousand, five hundred sixty-four".