163253653 has 4 divisors (see below), whose sum is σ = 163611340. Its totient is φ = 162895968.

The previous prime is 163253639. The next prime is 163253683. The reversal of 163253653 is 356352361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 128890609 + 34363044 = 11353^2 + 5862^2 .

It is a cyclic number.

It is not a de Polignac number, because 163253653 - 2²⁵ = 129699221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163253683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178158 + ... + 179071.

It is an arithmetic number, because the mean of its divisors is an integer number (40902835).

Almost surely, 2^163253653 is an apocalyptic number.

It is an amenable number.

163253653 is a deficient number, since it is larger than the sum of its proper divisors (357687).

163253653 is an equidigital number, since it uses as much as digits as its factorization.

163253653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357686.

The product of its digits is 48600, while the sum is 34.

The square root of 163253653 is about 12777.0752913176. The cubic root of 163253653 is about 546.5387627512.

The spelling of 163253653 in words is "one hundred sixty-three million, two hundred fifty-three thousand, six hundred fifty-three".