165057353181 has 48 divisors (see below), whose sum is σ = 282747838464. Its totient is φ = 94258234224.

The previous prime is 165057353177. The next prime is 165057353191. The reversal of 165057353181 is 181353750561.

165057353181 is a `hidden beast` number, since 1 + 6 + 505 + 7 + 35 + 31 + 81 = 666.

It is not a de Polignac number, because 165057353181 - 2² = 165057353177 is a prime.

It is a super-2 number, since 2×165057353181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165057353161) 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 47 ways as a sum of consecutive naturals, for example, 2703316 + ... + 2763698.

It is an arithmetic number, because the mean of its divisors is an integer number (5890579968).

Almost surely, 2^165057353181 is an apocalyptic number.

It is an amenable number.

165057353181 is a deficient number, since it is larger than the sum of its proper divisors (117690485283).

165057353181 is an equidigital number, since it uses as much as digits as its factorization.

165057353181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62012 (or 62000 counting only the distinct ones).

The product of its (nonzero) digits is 378000, while the sum is 45.

The spelling of 165057353181 in words is "one hundred sixty-five billion, fifty-seven million, three hundred fifty-three thousand, one hundred eighty-one".