138871692936 has 24 divisors (see below), whose sum is σ = 376110835230. Its totient is φ = 46290564288.

The previous prime is 138871692859. The next prime is 138871692959. The reversal of 138871692936 is 639296178831.

138871692936 is a `hidden beast` number, since 1 + 388 + 7 + 169 + 2 + 93 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 96973696836 + 41897996100 = 311406^2 + 204690^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 964386685 + ... + 964386828.

Almost surely, 2^138871692936 is an apocalyptic number.

It is an amenable number.

138871692936 is an abundant number, since it is smaller than the sum of its proper divisors (237239142294).

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

138871692936 is a wasteful number, since it uses less digits than its factorization.

138871692936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1928773525 (or 1928773518 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 138871692936 in words is "one hundred thirty-eight billion, eight hundred seventy-one million, six hundred ninety-two thousand, nine hundred thirty-six".