163728788755 has 32 divisors (see below), whose sum is σ = 228161825280. Its totient is φ = 110465372160.

The previous prime is 163728788753. The next prime is 163728788767. The reversal of 163728788755 is 557887827361.

It is not a de Polignac number, because 163728788755 - 2¹ = 163728788753 is a prime.

It is a Smith number, since the sum of its digits (67) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (67).

It is not an unprimeable number, because it can be changed into a prime (163728788753) 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, 1973715 + ... + 2054995.

It is an arithmetic number, because the mean of its divisors is an integer number (7130057040).

Almost surely, 2^163728788755 is an apocalyptic number.

163728788755 is a deficient number, since it is larger than the sum of its proper divisors (64433036525).

163728788755 is an equidigital number, since it uses as much as digits as its factorization.

163728788755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82219.

The product of its digits is 158054400, while the sum is 67.

The spelling of 163728788755 in words is "one hundred sixty-three billion, seven hundred twenty-eight million, seven hundred eighty-eight thousand, seven hundred fifty-five".