138809902175952 has 120 divisors (see below), whose sum is σ = 417144073383072. Its totient is φ = 39659387040000.

The previous prime is 138809902175929. The next prime is 138809902175957. The reversal of 138809902175952 is 259571209908831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138809902175957) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 173887327 + ... + 174683777.

Almost surely, 2^{138809902175952} is an apocalyptic number.

138809902175952 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138809902175952 is an abundant number, since it is smaller than the sum of its proper divisors (278334171207120).

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

138809902175952 is a wasteful number, since it uses less digits than its factorization.

138809902175952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870577 (or 870564 counting only the distinct ones).

The product of its (nonzero) digits is 97977600, while the sum is 69.

The spelling of 138809902175952 in words is "one hundred thirty-eight trillion, eight hundred nine billion, nine hundred two million, one hundred seventy-five thousand, nine hundred fifty-two".