138805288937 has 32 divisors (see below), whose sum is σ = 169873735680. Its totient is φ = 110780006400.

The previous prime is 138805288901. The next prime is 138805288961. The reversal of 138805288937 is 739882508831.

It is not a de Polignac number, because 138805288937 - 2⁶ = 138805288873 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 138805288937.

It is not an unprimeable number, because it can be changed into a prime (138805285937) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1768937 + ... + 1845737.

It is an arithmetic number, because the mean of its divisors is an integer number (5308554240).

Almost surely, 2^138805288937 is an apocalyptic number.

It is an amenable number.

138805288937 is a deficient number, since it is larger than the sum of its proper divisors (31068446743).

138805288937 is a wasteful number, since it uses less digits than its factorization.

138805288937 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77061.

The product of its (nonzero) digits is 23224320, while the sum is 62.

The spelling of 138805288937 in words is "one hundred thirty-eight billion, eight hundred five million, two hundred eighty-eight thousand, nine hundred thirty-seven".