138915660875 has 16 divisors (see below), whose sum is σ = 174274454016. Its totient is φ = 110550664000.

The previous prime is 138915660869. The next prime is 138915660899. The reversal of 138915660875 is 578066519831.

It is a happy number.

It is not a de Polignac number, because 138915660875 - 2²⁸ = 138647225419 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2885354 + ... + 2933103.

It is an arithmetic number, because the mean of its divisors is an integer number (10892153376).

Almost surely, 2^138915660875 is an apocalyptic number.

138915660875 is a deficient number, since it is larger than the sum of its proper divisors (35358793141).

138915660875 is an equidigital number, since it uses as much as digits as its factorization.

138915660875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5818663 (or 5818653 counting only the distinct ones).

The product of its (nonzero) digits is 10886400, while the sum is 59.

The spelling of 138915660875 in words is "one hundred thirty-eight billion, nine hundred fifteen million, six hundred sixty thousand, eight hundred seventy-five".