163621472256 has 576 divisors, whose sum is σ = 548414193600. Its totient is φ = 48372940800.

The previous prime is 163621472251. The next prime is 163621472269. The reversal of 163621472256 is 652274126361.

163621472256 is a `hidden beast` number, since 1 + 636 + 2 + 1 + 4 + 7 + 2 + 2 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163621472251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3990767596 + ... + 3990767636.

It is an arithmetic number, because the mean of its divisors is an integer number (952107975).

Almost surely, 2^163621472256 is an apocalyptic number.

163621472256 is a gapful number since it is divisible by the number (16) 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 163621472256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274207096800).

163621472256 is an abundant number, since it is smaller than the sum of its proper divisors (384792721344).

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

163621472256 is an frugal number, since it uses more digits than its factorization.

163621472256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107 (or 57 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 163621472256 in words is "one hundred sixty-three billion, six hundred twenty-one million, four hundred seventy-two thousand, two hundred fifty-six".