171661225996 has 12 divisors (see below), whose sum is σ = 323515387552. Its totient is φ = 79228258128.

The previous prime is 171661225987. The next prime is 171661226047. The reversal of 171661225996 is 699522166171.

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, 1650588660 + ... + 1650588763.

Almost surely, 2^171661225996 is an apocalyptic number.

It is an amenable number.

171661225996 is a deficient number, since it is larger than the sum of its proper divisors (151854161556).

171661225996 is a wasteful number, since it uses less digits than its factorization.

171661225996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3301177440 (or 3301177438 counting only the distinct ones).

The product of its digits is 2449440, while the sum is 55.

The spelling of 171661225996 in words is "one hundred seventy-one billion, six hundred sixty-one million, two hundred twenty-five thousand, nine hundred ninety-six".