165070056520 has 32 divisors (see below), whose sum is σ = 375236580600. Its totient is φ = 65347319808.

The previous prime is 165070056511. The next prime is 165070056521. The reversal of 165070056520 is 25650070561.

It can be written as a sum of positive squares in 4 ways, for example, as 108200207844 + 56869848676 = 328938^2 + 238474^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 165070056520.

It is not an unprimeable number, because it can be changed into a prime (165070056521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21268035 + ... + 21275794.

Almost surely, 2^165070056520 is an apocalyptic number.

165070056520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165070056520 is an abundant number, since it is smaller than the sum of its proper divisors (210166524080).

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

165070056520 is a wasteful number, since it uses less digits than its factorization.

165070056520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42543937 (or 42543933 counting only the distinct ones).

The product of its (nonzero) digits is 63000, while the sum is 37.

The spelling of 165070056520 in words is "one hundred sixty-five billion, seventy million, fifty-six thousand, five hundred twenty".