161392544 has 12 divisors (see below), whose sum is σ = 317741634. Its totient is φ = 80696256.

The previous prime is 161392537. The next prime is 161392549. The reversal of 161392544 is 445293161.

161392544 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 100240144 + 61152400 = 10012^2 + 7820^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (161392549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2521727 + ... + 2521790.

Almost surely, 2^161392544 is an apocalyptic number.

It is an amenable number.

161392544 is a deficient number, since it is larger than the sum of its proper divisors (156349090).

161392544 is an equidigital number, since it uses as much as digits as its factorization.

161392544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5043527 (or 5043519 counting only the distinct ones).

The product of its digits is 25920, while the sum is 35.

The square root of 161392544 is about 12704.0365238770. The cubic root of 161392544 is about 544.4539535507.

The spelling of 161392544 in words is "one hundred sixty-one million, three hundred ninety-two thousand, five hundred forty-four".