163088561 has 12 divisors (see below), whose sum is σ = 171879552. Its totient is φ = 154453464.

The previous prime is 163088557. The next prime is 163088573. The reversal of 163088561 is 165880361.

It is a happy number.

It is not a de Polignac number, because 163088561 - 2² = 163088557 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163088501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 444200 + ... + 444566.

It is an arithmetic number, because the mean of its divisors is an integer number (14323296).

Almost surely, 2^163088561 is an apocalyptic number.

It is an amenable number.

163088561 is a deficient number, since it is larger than the sum of its proper divisors (8790991).

163088561 is an equidigital number, since it uses as much as digits as its factorization.

163088561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668 (or 529 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 163088561 is about 12770.6131802666. The cubic root of 163088561 is about 546.3544695610.

The spelling of 163088561 in words is "one hundred sixty-three million, eighty-eight thousand, five hundred sixty-one".