138773115765 has 24 divisors (see below), whose sum is σ = 240567994368. Its totient is φ = 74003735520.

The previous prime is 138773115703. The next prime is 138773115791. The reversal of 138773115765 is 567511377831.

138773115765 is a `hidden beast` number, since 1 + 38 + 7 + 7 + 31 + 1 + 576 + 5 = 666.

138773115765 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 138773115765 - 2⁹ = 138773115253 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 222792 + ... + 571998.

It is an arithmetic number, because the mean of its divisors is an integer number (10023666432).

Almost surely, 2^138773115765 is an apocalyptic number.

138773115765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138773115765 is a deficient number, since it is larger than the sum of its proper divisors (101794878603).

138773115765 is a wasteful number, since it uses less digits than its factorization.

138773115765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358049 (or 358046 counting only the distinct ones).

The product of its digits is 3704400, while the sum is 54.

It can be divided in two parts, 13877311 and 5765, that added together give a square (13883076 = 3726²).

The spelling of 138773115765 in words is "one hundred thirty-eight billion, seven hundred seventy-three million, one hundred fifteen thousand, seven hundred sixty-five".