165655142204123 has 32 divisors (see below), whose sum is σ = 196468063529472. Its totient is φ = 137689913894400.

The previous prime is 165655142204051. The next prime is 165655142204141. The reversal of 165655142204123 is 321402241556561.

It is a happy number.

165655142204123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165655142204123 - 2¹⁰ = 165655142203099 is a prime.

It is a super-2 number, since 2×165655142204123² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165655142201123) 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, 21023936 + ... + 27808562.

It is an arithmetic number, because the mean of its divisors is an integer number (6139626985296).

Almost surely, 2^{165655142204123} is an apocalyptic number.

165655142204123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

165655142204123 is a deficient number, since it is larger than the sum of its proper divisors (30812921325349).

165655142204123 is a wasteful number, since it uses less digits than its factorization.

165655142204123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6786275.

The product of its (nonzero) digits is 1728000, while the sum is 47.

The spelling of 165655142204123 in words is "one hundred sixty-five trillion, six hundred fifty-five billion, one hundred forty-two million, two hundred four thousand, one hundred twenty-three".