165109129026 has 32 divisors (see below), whose sum is σ = 336018309120. Its totient is φ = 54070829904.

The previous prime is 165109129001. The next prime is 165109129027. The reversal of 165109129026 is 620921901561.

It is a super-2 number, since 2×165109129026² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165109129027) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 448471 + ... + 728933.

It is an arithmetic number, because the mean of its divisors is an integer number (10500572160).

Almost surely, 2^165109129026 is an apocalyptic number.

165109129026 is an abundant number, since it is smaller than the sum of its proper divisors (170909180094).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165109129026 is a wasteful number, since it uses less digits than its factorization.

165109129026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 282190.

The product of its (nonzero) digits is 58320, while the sum is 42.

The spelling of 165109129026 in words is "one hundred sixty-five billion, one hundred nine million, one hundred twenty-nine thousand, twenty-six".