138172976640 has 120 divisors (see below), whose sum is σ = 478531959048. Its totient is φ = 36846120960.

The previous prime is 138172976609. The next prime is 138172976653. The reversal of 138172976640 is 46679271831.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2975506 + ... + 3021585.

Almost surely, 2^138172976640 is an apocalyptic number.

138172976640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138172976640 is an abundant number, since it is smaller than the sum of its proper divisors (340358982408).

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

138172976640 is an equidigital number, since it uses as much as digits as its factorization.

138172976640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997120 (or 5997101 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 54.

The spelling of 138172976640 in words is "one hundred thirty-eight billion, one hundred seventy-two million, nine hundred seventy-six thousand, six hundred forty".