165515505015 has 64 divisors (see below), whose sum is σ = 315906656256. Its totient is φ = 72353690112.

The previous prime is 165515504981. The next prime is 165515505019. The reversal of 165515505015 is 510505515561.

It is not a de Polignac number, because 165515505015 - 2¹⁴ = 165515488631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165515505019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 10900969 + ... + 10916141.

It is an arithmetic number, because the mean of its divisors is an integer number (4936041504).

Almost surely, 2^165515505015 is an apocalyptic number.

165515505015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165515505015 is a deficient number, since it is larger than the sum of its proper divisors (150391151241).

165515505015 is a wasteful number, since it uses less digits than its factorization.

165515505015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19728.

The product of its (nonzero) digits is 93750, while the sum is 39.

The spelling of 165515505015 in words is "one hundred sixty-five billion, five hundred fifteen million, five hundred five thousand, fifteen".