161240544 has 60 divisors (see below), whose sum is σ = 474211584. Its totient is φ = 53745984.

The previous prime is 161240543. The next prime is 161240549. The reversal of 161240544 is 445042161.

161240544 is a `hidden beast` number, since 1 + 612 + 4 + 0 + 5 + 44 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161240543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 28512 + ... + 33695.

Almost surely, 2^161240544 is an apocalyptic number.

It is an amenable number.

161240544 is an abundant number, since it is smaller than the sum of its proper divisors (312971040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161240544 is an equidigital number, since it uses as much as digits as its factorization.

161240544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62229 (or 62212 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 161240544 is about 12698.0527641052. The cubic root of 161240544 is about 544.2829770550.

The spelling of 161240544 in words is "one hundred sixty-one million, two hundred forty thousand, five hundred forty-four".