161265576 has 32 divisors (see below), whose sum is σ = 406072800. Its totient is φ = 53367360.

The previous prime is 161265563. The next prime is 161265613. The reversal of 161265576 is 675562161.

It is a super-2 number, since 2×161265576² = 52013172005223552, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20835 + ... + 27506.

It is an arithmetic number, because the mean of its divisors is an integer number (12689775).

Almost surely, 2^161265576 is an apocalyptic number.

It is an amenable number.

161265576 is an abundant number, since it is smaller than the sum of its proper divisors (244807224).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161265576 is a wasteful number, since it uses less digits than its factorization.

161265576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48489 (or 48485 counting only the distinct ones).

The product of its digits is 75600, while the sum is 39.

The square root of 161265576 is about 12699.0383887915. The cubic root of 161265576 is about 544.3111415728.

The spelling of 161265576 in words is "one hundred sixty-one million, two hundred sixty-five thousand, five hundred seventy-six".