163223632512 has 144 divisors (see below), whose sum is σ = 473209122750. Its totient is φ = 54003585024.

The previous prime is 163223632427. The next prime is 163223632589. The reversal of 163223632512 is 215236322361.

163223632512 is a `hidden beast` number, since 1 + 6 + 3 + 2 + 2 + 3 + 632 + 5 + 12 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 160852332096 + 2371300416 = 401064^2 + 48696^2 .

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 21618114 + ... + 21625662.

Almost surely, 2^163223632512 is an apocalyptic number.

163223632512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 163223632512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236604561375).

163223632512 is an abundant number, since it is smaller than the sum of its proper divisors (309985490238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

163223632512 is an equidigital number, since it uses as much as digits as its factorization.

163223632512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7843 (or 7691 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

Adding to 163223632512 its reverse (215236322361), we get a palindrome (378459954873).

The spelling of 163223632512 in words is "one hundred sixty-three billion, two hundred twenty-three million, six hundred thirty-two thousand, five hundred twelve".