161644324 has 12 divisors (see below), whose sum is σ = 297766000. Its totient is φ = 76568328.

The previous prime is 161644321. The next prime is 161644333. The reversal of 161644324 is 423446161.

161644324 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161644324² = 52257774962833952, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161644321) 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, 1063374 + ... + 1063525.

Almost surely, 2^161644324 is an apocalyptic number.

It is an amenable number.

161644324 is a deficient number, since it is larger than the sum of its proper divisors (136121676).

161644324 is a wasteful number, since it uses less digits than its factorization.

161644324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2126922 (or 2126920 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The square root of 161644324 is about 12713.9421109269. The cubic root of 161644324 is about 544.7369310862.

The spelling of 161644324 in words is "one hundred sixty-one million, six hundred forty-four thousand, three hundred twenty-four".