163529227638 has 96 divisors (see below), whose sum is σ = 410856316416. Its totient is φ = 46039964544.

The previous prime is 163529227621. The next prime is 163529227651. The reversal of 163529227638 is 836722925361.

163529227638 is a `hidden beast` number, since 1 + 6 + 352 + 9 + 227 + 63 + 8 = 666.

163529227638 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10689631 + ... + 10704917.

It is an arithmetic number, because the mean of its divisors is an integer number (4279753296).

Almost surely, 2^163529227638 is an apocalyptic number.

163529227638 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 163529227638, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (205428158208).

163529227638 is an abundant number, since it is smaller than the sum of its proper divisors (247327088778).

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

163529227638 is a wasteful number, since it uses less digits than its factorization.

163529227638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16538 (or 16535 counting only the distinct ones).

The product of its digits is 6531840, while the sum is 54.

The spelling of 163529227638 in words is "one hundred sixty-three billion, five hundred twenty-nine million, two hundred twenty-seven thousand, six hundred thirty-eight".