161168725 has 12 divisors (see below), whose sum is σ = 200007040. Its totient is φ = 128833200.

The previous prime is 161168723. The next prime is 161168729. The reversal of 161168725 is 527861161.

It is not a de Polignac number, because 161168725 - 2¹ = 161168723 is a prime.

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161168723) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57916 + ... + 60634.

Almost surely, 2^161168725 is an apocalyptic number.

It is an amenable number.

161168725 is a deficient number, since it is larger than the sum of its proper divisors (38838315).

161168725 is a wasteful number, since it uses less digits than its factorization.

161168725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5100 (or 5095 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 161168725 is about 12695.2244958488. The cubic root of 161168725 is about 544.2021544047.

The spelling of 161168725 in words is "one hundred sixty-one million, one hundred sixty-eight thousand, seven hundred twenty-five".