165137542625 has 32 divisors (see below), whose sum is σ = 226444982400. Its totient is φ = 119235864000.

The previous prime is 165137542607. The next prime is 165137542627. The reversal of 165137542625 is 526245731561.

It is a de Polignac number, because none of the positive numbers 2^k-165137542625 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 165137542625.

It is not an unprimeable number, because it can be changed into a prime (165137542627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240890 + ... + 623139.

It is an arithmetic number, because the mean of its divisors is an integer number (7076405700).

Almost surely, 2^165137542625 is an apocalyptic number.

It is an amenable number.

165137542625 is a deficient number, since it is larger than the sum of its proper divisors (61307439775).

165137542625 is a wasteful number, since it uses less digits than its factorization.

165137542625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 864194 (or 864184 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 47.

The spelling of 165137542625 in words is "one hundred sixty-five billion, one hundred thirty-seven million, five hundred forty-two thousand, six hundred twenty-five".