165120255150155 has 32 divisors (see below), whose sum is σ = 208786288435200. Its totient is φ = 125015805216000.

The previous prime is 165120255150139. The next prime is 165120255150157. The reversal of 165120255150155 is 551051552021561.

It is not a de Polignac number, because 165120255150155 - 2⁴ = 165120255150139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165120255150157) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 731514551 + ... + 731740239.

It is an arithmetic number, because the mean of its divisors is an integer number (6524571513600).

Almost surely, 2^{165120255150155} is an apocalyptic number.

165120255150155 is a deficient number, since it is larger than the sum of its proper divisors (43666033285045).

165120255150155 is a wasteful number, since it uses less digits than its factorization.

165120255150155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233555.

The product of its (nonzero) digits is 375000, while the sum is 44.

The spelling of 165120255150155 in words is "one hundred sixty-five trillion, one hundred twenty billion, two hundred fifty-five million, one hundred fifty thousand, one hundred fifty-five".