138776500025 has 12 divisors (see below), whose sum is σ = 172088991552. Its totient is φ = 111017244240.

The previous prime is 138776500007. The next prime is 138776500091. The reversal of 138776500025 is 520005677831.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-138776500025 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 764612 + ... + 928538.

It is an arithmetic number, because the mean of its divisors is an integer number (14340749296).

Almost surely, 2^138776500025 is an apocalyptic number.

It is an amenable number.

138776500025 is a deficient number, since it is larger than the sum of its proper divisors (33312491527).

138776500025 is a wasteful number, since it uses less digits than its factorization.

138776500025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197800 (or 197795 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 44.

The spelling of 138776500025 in words is "one hundred thirty-eight billion, seven hundred seventy-six million, five hundred thousand, twenty-five".