165235271018 has 16 divisors (see below), whose sum is σ = 249517636800. Its totient is φ = 82062828000.

The previous prime is 165235271017. The next prime is 165235271027. The reversal of 165235271018 is 810172532561.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (165235271017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4584833 + ... + 4620731.

It is an arithmetic number, because the mean of its divisors is an integer number (15594852300).

Almost surely, 2^165235271018 is an apocalyptic number.

165235271018 is a deficient number, since it is larger than the sum of its proper divisors (84282365782).

165235271018 is a wasteful number, since it uses less digits than its factorization.

165235271018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51293.

The product of its (nonzero) digits is 100800, while the sum is 41.

The spelling of 165235271018 in words is "one hundred sixty-five billion, two hundred thirty-five million, two hundred seventy-one thousand, eighteen".