165280064000 has 80 divisors (see below), whose sum is σ = 412136329176. Its totient is φ = 66112000000.

The previous prime is 165280063981. The next prime is 165280064023. The reversal of 165280064000 is 460082561.

It can be written as a sum of positive squares in 4 ways, for example, as 9084377344 + 156195686656 = 95312^2 + 395216^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227251 + ... + 1355250.

Almost surely, 2^165280064000 is an apocalyptic number.

165280064000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165280064000 is an abundant number, since it is smaller than the sum of its proper divisors (246856265176).

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

165280064000 is an frugal number, since it uses more digits than its factorization.

165280064000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2582534 (or 2582508 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The spelling of 165280064000 in words is "one hundred sixty-five billion, two hundred eighty million, sixty-four thousand".