161541064 has 8 divisors (see below), whose sum is σ = 302889510. Its totient is φ = 80770528.

The previous prime is 161541047. The next prime is 161541073. The reversal of 161541064 is 460145161.

It can be written as a sum of positive squares in only one way, i.e., 152720164 + 8820900 = 12358^2 + 2970^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 10096309 + ... + 10096324.

Almost surely, 2^161541064 is an apocalyptic number.

It is an amenable number.

161541064 is a deficient number, since it is larger than the sum of its proper divisors (141348446).

161541064 is a wasteful number, since it uses less digits than its factorization.

161541064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20192639 (or 20192635 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 161541064 is about 12709.8805659219. The cubic root of 161541064 is about 544.6209119235.

The spelling of 161541064 in words is "one hundred sixty-one million, five hundred forty-one thousand, sixty-four".