163556460 has 72 divisors (see below), whose sum is σ = 499183776. Its totient is φ = 43345920.

The previous prime is 163556443. The next prime is 163556479. The reversal of 163556460 is 64655361.

163556460 is a `hidden beast` number, since 1 + 6 + 3 + 5 + 5 + 646 + 0 = 666.

163556460 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27340 + ... + 32780.

It is an arithmetic number, because the mean of its divisors is an integer number (6933108).

Almost surely, 2^163556460 is an apocalyptic number.

163556460 is a gapful number since it is divisible by the number (10) 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 163556460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249591888).

163556460 is an abundant number, since it is smaller than the sum of its proper divisors (335627316).

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

163556460 is a wasteful number, since it uses less digits than its factorization.

163556460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5623 (or 5618 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 163556460 is about 12788.9194226878. The cubic root of 163556460 is about 546.8764653457.

The spelling of 163556460 in words is "one hundred sixty-three million, five hundred fifty-six thousand, four hundred sixty".