138532765 has 16 divisors (see below), whose sum is σ = 190794240. Its totient is φ = 94590720.

The previous prime is 138532717. The next prime is 138532777. The reversal of 138532765 is 567235831.

138532765 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138532765 - 2¹⁷ = 138401693 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85 + ... + 16645.

It is an arithmetic number, because the mean of its divisors is an integer number (11924640).

Almost surely, 2^138532765 is an apocalyptic number.

It is an amenable number.

138532765 is a deficient number, since it is larger than the sum of its proper divisors (52261475).

138532765 is a wasteful number, since it uses less digits than its factorization.

138532765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16812.

The product of its digits is 151200, while the sum is 40.

The square root of 138532765 is about 11769.9942650793. The cubic root of 138532765 is about 517.4290815869.

The spelling of 138532765 in words is "one hundred thirty-eight million, five hundred thirty-two thousand, seven hundred sixty-five".