138691716960 has 48 divisors (see below), whose sum is σ = 436878909936. Its totient is φ = 36984457728.

The previous prime is 138691716937. The next prime is 138691716991. The reversal of 138691716960 is 69617196831.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 138691716960.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144470059 + ... + 144471018.

It is an arithmetic number, because the mean of its divisors is an integer number (9101643957).

Almost surely, 2^138691716960 is an apocalyptic number.

138691716960 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138691716960 is an abundant number, since it is smaller than the sum of its proper divisors (298187192976).

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

138691716960 is a wasteful number, since it uses less digits than its factorization.

138691716960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288941095 (or 288941087 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 57.

The spelling of 138691716960 in words is "one hundred thirty-eight billion, six hundred ninety-one million, seven hundred sixteen thousand, nine hundred sixty".