165055505422525 has 18 divisors (see below), whose sum is σ = 205566481531662. Its totient is φ = 131467790174400.

The previous prime is 165055505422513. The next prime is 165055505422547. The reversal of 165055505422525 is 525224505550561.

It can be written as a sum of positive squares in 9 ways, for example, as 2830934121444 + 162224571301081 = 1682538^2 + 12736741^2 .

It is a de Polignac number, because none of the positive numbers 2^k-165055505422525 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 61638006 + ... + 64260055.

Almost surely, 2^{165055505422525} is an apocalyptic number.

It is an amenable number.

165055505422525 is a deficient number, since it is larger than the sum of its proper divisors (40510976109137).

165055505422525 is an equidigital number, since it uses as much as digits as its factorization.

165055505422525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125898529 (or 125898295 counting only the distinct ones).

The product of its (nonzero) digits is 15000000, while the sum is 52.

The spelling of 165055505422525 in words is "one hundred sixty-five trillion, fifty-five billion, five hundred five million, four hundred twenty-two thousand, five hundred twenty-five".