165387938925 has 24 divisors (see below), whose sum is σ = 298299702240. Its totient is φ = 80188091200.

The previous prime is 165387938887. The next prime is 165387939007. The reversal of 165387938925 is 529839783561.

165387938925 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 165387938925 - 2⁶ = 165387938861 is a prime.

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, 100234290 + ... + 100235939.

It is an arithmetic number, because the mean of its divisors is an integer number (12429154260).

Almost surely, 2^165387938925 is an apocalyptic number.

165387938925 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165387938925 is a deficient number, since it is larger than the sum of its proper divisors (132911763315).

165387938925 is a wasteful number, since it uses less digits than its factorization.

165387938925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200470253 (or 200470248 counting only the distinct ones).

The product of its digits is 97977600, while the sum is 66.

The spelling of 165387938925 in words is "one hundred sixty-five billion, three hundred eighty-seven million, nine hundred thirty-eight thousand, nine hundred twenty-five".