161579144 has 16 divisors (see below), whose sum is σ = 306366300. Its totient is φ = 79881472.

The previous prime is 161579141. The next prime is 161579147. The reversal of 161579144 is 441975161.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (161579141) and next prime (161579147).

It can be written as a sum of positive squares in 2 ways, for example, as 156000100 + 5579044 = 12490^2 + 2362^2 .

It is a super-2 number, since 2×161579144² = 52215639551545472, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161579098 and 161579107.

It is not an unprimeable number, because it can be changed into a prime (161579141) 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, 112757 + ... + 114180.

Almost surely, 2^161579144 is an apocalyptic number.

It is an amenable number.

161579144 is a deficient number, since it is larger than the sum of its proper divisors (144787156).

161579144 is a wasteful number, since it uses less digits than its factorization.

161579144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227032 (or 227028 counting only the distinct ones).

The product of its digits is 30240, while the sum is 38.

The square root of 161579144 is about 12711.3785247706. The cubic root of 161579144 is about 544.6637029729.

The spelling of 161579144 in words is "one hundred sixty-one million, five hundred seventy-nine thousand, one hundred forty-four".