138367640704 has 32 divisors (see below), whose sum is σ = 276149317500. Its totient is φ = 69059576832.

The previous prime is 138367640683. The next prime is 138367640713. The reversal of 138367640704 is 407046763831.

It can be written as a sum of positive squares in 2 ways, for example, as 137403662400 + 963978304 = 370680^2 + 31048^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 899079 + ... + 1041670.

Almost surely, 2^138367640704 is an apocalyptic number.

It is an amenable number.

138367640704 is a deficient number, since it is larger than the sum of its proper divisors (137781676796).

138367640704 is an equidigital number, since it uses as much as digits as its factorization.

138367640704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1941320 (or 1941308 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 49.

The spelling of 138367640704 in words is "one hundred thirty-eight billion, three hundred sixty-seven million, six hundred forty thousand, seven hundred four".