138525564 has 24 divisors (see below), whose sum is σ = 323861328. Its totient is φ = 46084480.

The previous prime is 138525559. The next prime is 138525581. The reversal of 138525564 is 465525831.

138525564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 4827 + ... + 17330.

It is an arithmetic number, because the mean of its divisors is an integer number (13494222).

Almost surely, 2^138525564 is an apocalyptic number.

It is an amenable number.

138525564 is an abundant number, since it is smaller than the sum of its proper divisors (185335764).

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

138525564 is a wasteful number, since it uses less digits than its factorization.

138525564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22685 (or 22683 counting only the distinct ones).

The product of its digits is 144000, while the sum is 39.

The square root of 138525564 is about 11769.6883561121. The cubic root of 138525564 is about 517.4201160271.

The spelling of 138525564 in words is "one hundred thirty-eight million, five hundred twenty-five thousand, five hundred sixty-four".