163228305138 has 64 divisors (see below), whose sum is σ = 341287575552. Its totient is φ = 51983303040.

The previous prime is 163228305131. The next prime is 163228305143. The reversal of 163228305138 is 831503822361.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 163228305138.

It is not an unprimeable number, because it can be changed into a prime (163228305131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29530131 + ... + 29535657.

It is an arithmetic number, because the mean of its divisors is an integer number (5332618368).

Almost surely, 2^163228305138 is an apocalyptic number.

163228305138 is an abundant number, since it is smaller than the sum of its proper divisors (178059270414).

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

163228305138 is a wasteful number, since it uses less digits than its factorization.

163228305138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7559.

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 163228305138 in words is "one hundred sixty-three billion, two hundred twenty-eight million, three hundred five thousand, one hundred thirty-eight".