138776514025 has 24 divisors (see below), whose sum is σ = 176513874264. Its totient is φ = 108169689600.

The previous prime is 138776514011. The next prime is 138776514043. The reversal of 138776514025 is 520415677831.

It can be written as a sum of positive squares in 12 ways, for example, as 58884360921 + 79892153104 = 242661^2 + 282652^2 .

It is not a de Polignac number, because 138776514025 - 2¹¹ = 138776511977 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 138776514025.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 686499 + ... + 865351.

It is an arithmetic number, because the mean of its divisors is an integer number (7354744761).

Almost surely, 2^138776514025 is an apocalyptic number.

It is an amenable number.

138776514025 is a deficient number, since it is larger than the sum of its proper divisors (37737360239).

138776514025 is a wasteful number, since it uses less digits than its factorization.

138776514025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179661 (or 179656 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 138776514025 in words is "one hundred thirty-eight billion, seven hundred seventy-six million, five hundred fourteen thousand, twenty-five".