138775126525 has 24 divisors (see below), whose sum is σ = 196739977280. Its totient is φ = 95123410560.

The previous prime is 138775126499. The next prime is 138775126547. The reversal of 138775126525 is 525621577831.

138775126525 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 138775126525 - 2⁷ = 138775126397 is a prime.

It is a super-4 number, since 4×138775126525⁴ (a number of 46 digits) contains 4444 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 306466 + ... + 609484.

Almost surely, 2^138775126525 is an apocalyptic number.

It is an amenable number.

138775126525 is a deficient number, since it is larger than the sum of its proper divisors (57964850755).

138775126525 is a wasteful number, since it uses less digits than its factorization.

138775126525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305653 (or 305648 counting only the distinct ones).

The product of its digits is 3528000, while the sum is 52.

The spelling of 138775126525 in words is "one hundred thirty-eight billion, seven hundred seventy-five million, one hundred twenty-six thousand, five hundred twenty-five".