161164544 has 36 divisors (see below), whose sum is σ = 322543200. Its totient is φ = 80371200.

The previous prime is 161164541. The next prime is 161164583. The reversal of 161164544 is 445461161.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 161164544.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161164541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152819 + ... + 153869.

Almost surely, 2^161164544 is an apocalyptic number.

It is an amenable number.

161164544 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

161164544 is an equidigital number, since it uses as much as digits as its factorization.

161164544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1666 (or 1652 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 161164544 is about 12695.0598265625. The cubic root of 161164544 is about 544.1974485106.

The spelling of 161164544 in words is "one hundred sixty-one million, one hundred sixty-four thousand, five hundred forty-four".