138712026776679 has 48 divisors (see below), whose sum is σ = 206572954151200. Its totient is φ = 89627507562240.

The previous prime is 138712026776657. The next prime is 138712026776681. The reversal of 138712026776679 is 976677620217831.

138712026776679 is a `hidden beast` number, since 1 + 387 + 120 + 2 + 67 + 7 + 6 + 67 + 9 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-138712026776679 is a prime.

It is a super-2 number, since 2×138712026776679² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138712026776699) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 362408097 + ... + 362790645.

Almost surely, 2^{138712026776679} is an apocalyptic number.

138712026776679 is a deficient number, since it is larger than the sum of its proper divisors (67860927374521).

138712026776679 is a wasteful number, since it uses less digits than its factorization.

138712026776679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386800 (or 386797 counting only the distinct ones).

The product of its (nonzero) digits is 448084224, while the sum is 72.

The spelling of 138712026776679 in words is "one hundred thirty-eight trillion, seven hundred twelve billion, twenty-six million, seven hundred seventy-six thousand, six hundred seventy-nine".