165780112 has 20 divisors (see below), whose sum is σ = 321954220. Its totient is φ = 82695168.

The previous prime is 165780103. The next prime is 165780161. The reversal of 165780112 is 211087561.

It can be written as a sum of positive squares in 2 ways, for example, as 62473216 + 103306896 = 7904^2 + 10164^2 .

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, 5037 + ... + 18892.

It is an arithmetic number, because the mean of its divisors is an integer number (16097711).

Almost surely, 2^165780112 is an apocalyptic number.

It is an amenable number.

165780112 is a deficient number, since it is larger than the sum of its proper divisors (156174108).

165780112 is a wasteful number, since it uses less digits than its factorization.

165780112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24370 (or 24364 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 31.

The square root of 165780112 is about 12875.5625896502. The cubic root of 165780112 is about 549.3436931834.

The spelling of 165780112 in words is "one hundred sixty-five million, seven hundred eighty thousand, one hundred twelve".