961156172 has 12 divisors (see below), whose sum is σ = 1682934456. Its totient is φ = 480317760.

The previous prime is 961156159. The next prime is 961156201. The reversal of 961156172 is 271651169.

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, 56654 + ... + 71637.

It is an arithmetic number, because the mean of its divisors is an integer number (140244538).

Almost surely, 2^961156172 is an apocalyptic number.

It is an amenable number.

961156172 is a deficient number, since it is larger than the sum of its proper divisors (721778284).

961156172 is a wasteful number, since it uses less digits than its factorization.

961156172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130168 (or 130166 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 961156172 is about 31002.5188008975. The cubic root of 961156172 is about 986.8806938204.

The spelling of 961156172 in words is "nine hundred sixty-one million, one hundred fifty-six thousand, one hundred seventy-two".