165755177025 has 24 divisors (see below), whose sum is σ = 274065985440. Its totient is φ = 88397139840.

The previous prime is 165755177017. The next prime is 165755177041. The reversal of 165755177025 is 520771557561.

It is not a de Polignac number, because 165755177025 - 2³ = 165755177017 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1291981 + ... + 1414469.

It is an arithmetic number, because the mean of its divisors is an integer number (11419416060).

Almost surely, 2^165755177025 is an apocalyptic number.

165755177025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165755177025 is a deficient number, since it is larger than the sum of its proper divisors (108310808415).

165755177025 is a wasteful number, since it uses less digits than its factorization.

165755177025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140545 (or 140540 counting only the distinct ones).

The product of its (nonzero) digits is 2572500, while the sum is 51.

The spelling of 165755177025 in words is "one hundred sixty-five billion, seven hundred fifty-five million, one hundred seventy-seven thousand, twenty-five".