163472561 has 24 divisors (see below), whose sum is σ = 208956480. Its totient is φ = 124906752.

The previous prime is 163472557. The next prime is 163472581. The reversal of 163472561 is 165274361.

It is not a de Polignac number, because 163472561 - 2² = 163472557 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (163472501) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36311 + ... + 40563.

It is an arithmetic number, because the mean of its divisors is an integer number (8706520).

Almost surely, 2^163472561 is an apocalyptic number.

It is an amenable number.

163472561 is a deficient number, since it is larger than the sum of its proper divisors (45483919).

163472561 is a wasteful number, since it uses less digits than its factorization.

163472561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4313 (or 4296 counting only the distinct ones).

The product of its digits is 30240, while the sum is 35.

The square root of 163472561 is about 12785.6388577185. The cubic root of 163472561 is about 546.7829395664.

The spelling of 163472561 in words is "one hundred sixty-three million, four hundred seventy-two thousand, five hundred sixty-one".