165220008064 has 32 divisors (see below), whose sum is σ = 332408164140. Its totient is φ = 81792076800.

The previous prime is 165220008061. The next prime is 165220008077. The reversal of 165220008064 is 460800022561.

It can be written as a sum of positive squares in 2 ways, for example, as 164803521600 + 416486464 = 405960^2 + 20408^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (165220008061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6377079 + ... + 6402934.

Almost surely, 2^165220008064 is an apocalyptic number.

It is an amenable number.

165220008064 is an abundant number, since it is smaller than the sum of its proper divisors (167188156076).

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

165220008064 is a wasteful number, since it uses less digits than its factorization.

165220008064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12780128 (or 12780116 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 165220008064 in words is "one hundred sixty-five billion, two hundred twenty million, eight thousand, sixty-four".