165515648 has 32 divisors (see below), whose sum is σ = 330429000. Its totient is φ = 82584576.

The previous prime is 165515641. The next prime is 165515677. The reversal of 165515648 is 846515561.

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-3 number, since 3×165515648³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165515641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78188 + ... + 80276.

Almost surely, 2^165515648 is an apocalyptic number.

It is an amenable number.

165515648 is a deficient number, since it is larger than the sum of its proper divisors (164913352).

165515648 is an equidigital number, since it uses as much as digits as its factorization.

165515648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2722 (or 2710 counting only the distinct ones).

The product of its digits is 144000, while the sum is 41.

The square root of 165515648 is about 12865.2884926845. The cubic root of 165515648 is about 549.0514205826.

The spelling of 165515648 in words is "one hundred sixty-five million, five hundred fifteen thousand, six hundred forty-eight".