138775002639 has 96 divisors (see below), whose sum is σ = 238525672896. Its totient is φ = 71083837440.

The previous prime is 138775002617. The next prime is 138775002643. The reversal of 138775002639 is 936200577831.

138775002639 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 138775002639 - 2⁸ = 138775002383 is a prime.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 138775002591 and 138775002600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138775002679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 43624629 + ... + 43627809.

It is an arithmetic number, because the mean of its divisors is an integer number (2484642426).

Almost surely, 2^138775002639 is an apocalyptic number.

138775002639 is a deficient number, since it is larger than the sum of its proper divisors (99750670257).

138775002639 is a wasteful number, since it uses less digits than its factorization.

138775002639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3865 (or 3858 counting only the distinct ones).

The product of its (nonzero) digits is 1905120, while the sum is 51.

The spelling of 138775002639 in words is "one hundred thirty-eight billion, seven hundred seventy-five million, two thousand, six hundred thirty-nine".