138585664725 has 96 divisors (see below), whose sum is σ = 251286416640. Its totient is φ = 67081728000.

The previous prime is 138585664697. The next prime is 138585664729. The reversal of 138585664725 is 527466585831.

It is not a de Polignac number, because 138585664725 - 2⁷ = 138585664597 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138585664729) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 37749640 + ... + 37753310.

It is an arithmetic number, because the mean of its divisors is an integer number (2617566840).

Almost surely, 2^138585664725 is an apocalyptic number.

138585664725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

138585664725 is a deficient number, since it is larger than the sum of its proper divisors (112700751915).

138585664725 is a wasteful number, since it uses less digits than its factorization.

138585664725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4751 (or 4746 counting only the distinct ones).

The product of its digits is 48384000, while the sum is 60.

The spelling of 138585664725 in words is "one hundred thirty-eight billion, five hundred eighty-five million, six hundred sixty-four thousand, seven hundred twenty-five".