138195045 has 32 divisors (see below), whose sum is σ = 247881600. Its totient is φ = 73043712.

The previous prime is 138195019. The next prime is 138195047. The reversal of 138195045 is 540591831.

138195045 is a `hidden beast` number, since 138 + 19 + 504 + 5 = 666.

It is not a de Polignac number, because 138195045 - 2⁸ = 138194789 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138195047) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10726 + ... + 19784.

It is an arithmetic number, because the mean of its divisors is an integer number (7746300).

Almost surely, 2^138195045 is an apocalyptic number.

138195045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138195045 is a deficient number, since it is larger than the sum of its proper divisors (109686555).

138195045 is a wasteful number, since it uses less digits than its factorization.

138195045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9186 (or 9180 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 138195045 is about 11755.6388597132. The cubic root of 138195045 is about 517.0082705660.

The spelling of 138195045 in words is "one hundred thirty-eight million, one hundred ninety-five thousand, forty-five".