139427015256639 has 72 divisors (see below), whose sum is σ = 233435905968720. Its totient is φ = 79502216428800.

The previous prime is 139427015256619. The next prime is 139427015256677. The reversal of 139427015256639 is 936652510724931.

139427015256639 is a `hidden beast` number, since 1 + 3 + 9 + 4 + 2 + 70 + 1 + 525 + 6 + 6 + 39 = 666.

It is not a de Polignac number, because 139427015256639 - 2⁸ = 139427015256383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139427015256619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 18627454 + ... + 25016715.

Almost surely, 2^{139427015256639} is an apocalyptic number.

139427015256639 is a deficient number, since it is larger than the sum of its proper divisors (94008890712081).

139427015256639 is a wasteful number, since it uses less digits than its factorization.

139427015256639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43644293 (or 43644267 counting only the distinct ones).

The product of its (nonzero) digits is 73483200, while the sum is 63.

The spelling of 139427015256639 in words is "one hundred thirty-nine trillion, four hundred twenty-seven billion, fifteen million, two hundred fifty-six thousand, six hundred thirty-nine".