165617552 has 20 divisors (see below), whose sum is σ = 321086220. Its totient is φ = 82756608.

The previous prime is 165617539. The next prime is 165617567. The reversal of 165617552 is 255716561.

It can be written as a sum of positive squares in 2 ways, for example, as 103144336 + 62473216 = 10156^2 + 7904^2 .

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, 41768 + ... + 45560.

It is an arithmetic number, because the mean of its divisors is an integer number (16054311).

Almost surely, 2^165617552 is an apocalyptic number.

It is an amenable number.

165617552 is a deficient number, since it is larger than the sum of its proper divisors (155468668).

165617552 is a wasteful number, since it uses less digits than its factorization.

165617552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6530 (or 6524 counting only the distinct ones).

The product of its digits is 63000, while the sum is 38.

The square root of 165617552 is about 12869.2483074964. The cubic root of 165617552 is about 549.1640767133.

Subtracting 165617552 from its reverse (255716561), we obtain a palindrome (90099009).

The spelling of 165617552 in words is "one hundred sixty-five million, six hundred seventeen thousand, five hundred fifty-two".