165364756240 has 20 divisors (see below), whose sum is σ = 384473058444. Its totient is φ = 66145902464.

The previous prime is 165364756213. The next prime is 165364756259. The reversal of 165364756240 is 42657463561.

It can be written as a sum of positive squares in 2 ways, for example, as 22084337664 + 143280418576 = 148608^2 + 378524^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1033529647 + ... + 1033529806.

Almost surely, 2^165364756240 is an apocalyptic number.

165364756240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165364756240 is an abundant number, since it is smaller than the sum of its proper divisors (219108302204).

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

165364756240 is a wasteful number, since it uses less digits than its factorization.

165364756240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2067059466 (or 2067059460 counting only the distinct ones).

The product of its (nonzero) digits is 3628800, while the sum is 49.

The spelling of 165364756240 in words is "one hundred sixty-five billion, three hundred sixty-four million, seven hundred fifty-six thousand, two hundred forty".