138375660875 has 32 divisors (see below), whose sum is σ = 177090541056. Its totient is φ = 107892607200.

The previous prime is 138375660853. The next prime is 138375660881. The reversal of 138375660875 is 578066573831.

It is a happy number.

It is not a de Polignac number, because 138375660875 - 2¹⁶ = 138375595339 is a prime.

It is a Smith number, since the sum of its digits (59) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2482562 + ... + 2537688.

It is an arithmetic number, because the mean of its divisors is an integer number (5534079408).

Almost surely, 2^138375660875 is an apocalyptic number.

138375660875 is a deficient number, since it is larger than the sum of its proper divisors (38714880181).

138375660875 is an equidigital number, since it uses as much as digits as its factorization.

138375660875 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55652 (or 55642 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 59.

The spelling of 138375660875 in words is "one hundred thirty-eight billion, three hundred seventy-five million, six hundred sixty thousand, eight hundred seventy-five".