138915164 has 12 divisors (see below), whose sum is σ = 243531288. Its totient is φ = 69334800.

The previous prime is 138915163. The next prime is 138915169. The reversal of 138915164 is 461519831.

138915164 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 not an unprimeable number, because it can be changed into a prime (138915163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28127 + ... + 32694.

It is an arithmetic number, because the mean of its divisors is an integer number (20294274).

Almost surely, 2^138915164 is an apocalyptic number.

It is an amenable number.

138915164 is a deficient number, since it is larger than the sum of its proper divisors (104616124).

138915164 is a wasteful number, since it uses less digits than its factorization.

138915164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61396 (or 61394 counting only the distinct ones).

The product of its digits is 25920, while the sum is 38.

The square root of 138915164 is about 11786.2277256126. The cubic root of 138915164 is about 517.9047394182.

The spelling of 138915164 in words is "one hundred thirty-eight million, nine hundred fifteen thousand, one hundred sixty-four".