161431876 has 12 divisors (see below), whose sum is σ = 282599100. Its totient is φ = 80689280.

The previous prime is 161431867. The next prime is 161431903. The reversal of 161431876 is 678134161.

It can be written as a sum of positive squares in 2 ways, for example, as 148254976 + 13176900 = 12176^2 + 3630^2 .

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, 14256 + ... + 22936.

It is an arithmetic number, because the mean of its divisors is an integer number (23549925).

Almost surely, 2^161431876 is an apocalyptic number.

It is an amenable number.

161431876 is a deficient number, since it is larger than the sum of its proper divisors (121167224).

161431876 is a wasteful number, since it uses less digits than its factorization.

161431876 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13334 (or 13332 counting only the distinct ones).

The product of its digits is 24192, while the sum is 37.

The square root of 161431876 is about 12705.5844414966. The cubic root of 161431876 is about 544.4981784842.

The spelling of 161431876 in words is "one hundred sixty-one million, four hundred thirty-one thousand, eight hundred seventy-six".