138986660979 has 12 divisors (see below), whose sum is σ = 200824136032. Its totient is φ = 92627485200.

The previous prime is 138986660951. The next prime is 138986661019. The reversal of 138986660979 is 979066689831.

It is not a de Polignac number, because 138986660979 - 2⁷ = 138986660851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138986660779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2494987 + ... + 2550084.

Almost surely, 2^138986660979 is an apocalyptic number.

138986660979 is a deficient number, since it is larger than the sum of its proper divisors (61837475053).

138986660979 is a wasteful number, since it uses less digits than its factorization.

138986660979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5048138 (or 5048135 counting only the distinct ones).

The product of its (nonzero) digits is 211631616, while the sum is 72.

The spelling of 138986660979 in words is "one hundred thirty-eight billion, nine hundred eighty-six million, six hundred sixty thousand, nine hundred seventy-nine".