161374856 has 8 divisors (see below), whose sum is σ = 302577870. Its totient is φ = 80687424.

The previous prime is 161374841. The next prime is 161374859. The reversal of 161374856 is 658473161.

It can be written as a sum of positive squares in only one way, i.e., 85858756 + 75516100 = 9266^2 + 8690^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (161374859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10085921 + ... + 10085936.

Almost surely, 2^161374856 is an apocalyptic number.

It is an amenable number.

161374856 is a deficient number, since it is larger than the sum of its proper divisors (141203014).

161374856 is a wasteful number, since it uses less digits than its factorization.

161374856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20171863 (or 20171859 counting only the distinct ones).

The product of its digits is 120960, while the sum is 41.

The square root of 161374856 is about 12703.3403481132. The cubic root of 161374856 is about 544.4340628067.

The spelling of 161374856 in words is "one hundred sixty-one million, three hundred seventy-four thousand, eight hundred fifty-six".