165001665015 has 48 divisors (see below), whose sum is σ = 330356291616. Its totient is φ = 75294873600.

The previous prime is 165001664929. The next prime is 165001665019. The reversal of 165001665015 is 510566100561.

It is not a de Polignac number, because 165001665015 - 2²² = 164997470711 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165001665019) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9795606 + ... + 9812435.

It is an arithmetic number, because the mean of its divisors is an integer number (6882422742).

Almost surely, 2^165001665015 is an apocalyptic number.

165001665015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165001665015 is an abundant number, since it is smaller than the sum of its proper divisors (165354626601).

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

165001665015 is a wasteful number, since it uses less digits than its factorization.

165001665015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19608080 (or 19608077 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 36.

Adding to 165001665015 its reverse (510566100561), we get a palindrome (675567765576).

The spelling of 165001665015 in words is "one hundred sixty-five billion, one million, six hundred sixty-five thousand, fifteen".