163656441 has 12 divisors (see below), whose sum is σ = 254576868. Its totient is φ = 100711584.

The previous prime is 163656413. The next prime is 163656487. The reversal of 163656441 is 144656361.

It is a happy number.

163656441 is a `hidden beast` number, since 1 + 6 + 3 + 6 + 5 + 644 + 1 = 666.

163656441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 52142841 + 111513600 = 7221^2 + 10560^2 .

It is not a de Polignac number, because 163656441 - 2⁶ = 163656377 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 163656396 and 163656405.

It is not an unprimeable number, because it can be changed into a prime (163656041) 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, 699270 + ... + 699503.

It is an arithmetic number, because the mean of its divisors is an integer number (21214739).

Almost surely, 2^163656441 is an apocalyptic number.

It is an amenable number.

163656441 is a deficient number, since it is larger than the sum of its proper divisors (90920427).

163656441 is a wasteful number, since it uses less digits than its factorization.

163656441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398792 (or 1398789 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 163656441 is about 12792.8277171234. The cubic root of 163656441 is about 546.9878766557.

The spelling of 163656441 in words is "one hundred sixty-three million, six hundred fifty-six thousand, four hundred forty-one".