161796658 has 8 divisors (see below), whose sum is σ = 242839152. Its totient is φ = 80850276.

The previous prime is 161796653. The next prime is 161796707. The reversal of 161796658 is 856697161.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (161796653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19660 + ... + 26647.

It is an arithmetic number, because the mean of its divisors is an integer number (30354894).

Almost surely, 2^161796658 is an apocalyptic number.

161796658 is a deficient number, since it is larger than the sum of its proper divisors (81042494).

161796658 is a wasteful number, since it uses less digits than its factorization.

161796658 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48056.

The product of its digits is 544320, while the sum is 49.

The square root of 161796658 is about 12719.9315249729. The cubic root of 161796658 is about 544.9079978245.

The spelling of 161796658 in words is "one hundred sixty-one million, seven hundred ninety-six thousand, six hundred fifty-eight".