163561023 has 12 divisors (see below), whose sum is σ = 237456648. Its totient is φ = 108486000.

The previous prime is 163561019. The next prime is 163561033. The reversal of 163561023 is 320165361.

163561023 is a `hidden beast` number, since 1 + 635 + 6 + 1 + 0 + 23 = 666.

It is not a de Polignac number, because 163561023 - 2² = 163561019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163561033) 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, 44353 + ... + 47898.

It is an arithmetic number, because the mean of its divisors is an integer number (19788054).

Almost surely, 2^163561023 is an apocalyptic number.

163561023 is a deficient number, since it is larger than the sum of its proper divisors (73895625).

163561023 is a wasteful number, since it uses less digits than its factorization.

163561023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92454 (or 92451 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

The square root of 163561023 is about 12789.0978180636. The cubic root of 163561023 is about 546.8815509985.

The spelling of 163561023 in words is "one hundred sixty-three million, five hundred sixty-one thousand, twenty-three".