163555328 has 24 divisors (see below), whose sum is σ = 327034890. Its totient is φ = 81776640.

The previous prime is 163555321. The next prime is 163555361. The reversal of 163555328 is 823555361.

163555328 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 99042304 + 64513024 = 9952^2 + 8032^2 .

It is a junction number, because it is equal to n+sod(n) for n = 163555291 and 163555300.

It is not an unprimeable number, because it can be changed into a prime (163555321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37883 + ... + 41978.

Almost surely, 2^163555328 is an apocalyptic number.

It is an amenable number.

163555328 is a deficient number, since it is larger than the sum of its proper divisors (163479562).

163555328 is an frugal number, since it uses more digits than its factorization.

163555328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79883 (or 79863 counting only the distinct ones).

The product of its digits is 108000, while the sum is 38.

The square root of 163555328 is about 12788.8751655492. The cubic root of 163555328 is about 546.8752036701.

The spelling of 163555328 in words is "one hundred sixty-three million, five hundred fifty-five thousand, three hundred twenty-eight".