161192906 has 32 divisors (see below), whose sum is σ = 282881280. Its totient is φ = 67464576.

The previous prime is 161192893. The next prime is 161192971. The reversal of 161192906 is 609291161.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 110675 + ... + 112121.

It is an arithmetic number, because the mean of its divisors is an integer number (8840040).

Almost surely, 2^161192906 is an apocalyptic number.

161192906 is a deficient number, since it is larger than the sum of its proper divisors (121688374).

161192906 is a wasteful number, since it uses less digits than its factorization.

161192906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1638.

The product of its (nonzero) digits is 5832, while the sum is 35.

The square root of 161192906 is about 12696.1768261158. The cubic root of 161192906 is about 544.2293695571.

The spelling of 161192906 in words is "one hundred sixty-one million, one hundred ninety-two thousand, nine hundred six".