165324556513557 has 18 divisors (see below), whose sum is σ = 277790241217398. Its totient is φ = 94471175150352.

The previous prime is 165324556513553. The next prime is 165324556513559. The reversal of 165324556513557 is 755315655423561.

165324556513557 is a `hidden beast` number, since 1 + 6 + 5 + 3 + 2 + 4 + 5 + 5 + 65 + 13 + 557 = 666.

It can be written as a sum of positive squares in only one way, i.e., 113495485537476 + 51829070976081 = 10653426^2 + 7199241^2 .

It is not a de Polignac number, because 165324556513557 - 2² = 165324556513553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 165324556513494 and 165324556513503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165324556513553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 187442807398 + ... + 187442808279.

Almost surely, 2^{165324556513557} is an apocalyptic number.

It is an amenable number.

165324556513557 is a deficient number, since it is larger than the sum of its proper divisors (112465684703841).

165324556513557 is a wasteful number, since it uses less digits than its factorization.

165324556513557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374885615697 (or 374885615687 counting only the distinct ones).

The product of its digits is 283500000, while the sum is 63.

The spelling of 165324556513557 in words is "one hundred sixty-five trillion, three hundred twenty-four billion, five hundred fifty-six million, five hundred thirteen thousand, five hundred fifty-seven".