165713576225 has 24 divisors (see below), whose sum is σ = 219497658840. Its totient is φ = 123668357120.

The previous prime is 165713576209. The next prime is 165713576239. The reversal of 165713576225 is 522675317561.

It can be written as a sum of positive squares in 12 ways, for example, as 132227504161 + 33486072064 = 363631^2 + 182992^2 .

It is not a de Polignac number, because 165713576225 - 2⁴ = 165713576209 is a prime.

It is a hoax number, since the sum of its digits (50) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1677260 + ... + 1773309.

It is an arithmetic number, because the mean of its divisors is an integer number (9145735785).

Almost surely, 2^165713576225 is an apocalyptic number.

It is an amenable number.

165713576225 is a deficient number, since it is larger than the sum of its proper divisors (53784082615).

165713576225 is a wasteful number, since it uses less digits than its factorization.

165713576225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3450709 (or 3450704 counting only the distinct ones).

The product of its digits is 2646000, while the sum is 50.

The spelling of 165713576225 in words is "one hundred sixty-five billion, seven hundred thirteen million, five hundred seventy-six thousand, two hundred twenty-five".