161399231166 has 8 divisors (see below), whose sum is σ = 322798462344. Its totient is φ = 53799743720.

The previous prime is 161399231159. The next prime is 161399231167. The reversal of 161399231166 is 661132993161.

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

161399231166 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161399231167) 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, 13449935925 + ... + 13449935936.

It is an arithmetic number, because the mean of its divisors is an integer number (40349807793).

Almost surely, 2^161399231166 is an apocalyptic number.

161399231166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161399231166 is a wasteful number, since it uses less digits than its factorization.

161399231166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26899871866.

The product of its digits is 314928, while the sum is 48.

The spelling of 161399231166 in words is "one hundred sixty-one billion, three hundred ninety-nine million, two hundred thirty-one thousand, one hundred sixty-six".