163361556 has 24 divisors (see below), whose sum is σ = 423530240. Its totient is φ = 54453816.

The previous prime is 163361543. The next prime is 163361567. The reversal of 163361556 is 655163361.

163361556 is a `hidden beast` number, since 1 + 6 + 33 + 615 + 5 + 6 = 666.

163361556 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×163361556⁴ (a number of 34 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

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

It is a self number, because there is not a number n which added to its sum of digits gives 163361556.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 756196 + ... + 756411.

Almost surely, 2^163361556 is an apocalyptic number.

It is an amenable number.

163361556 is an abundant number, since it is smaller than the sum of its proper divisors (260168684).

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

163361556 is a wasteful number, since it uses less digits than its factorization.

163361556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1512620 (or 1512612 counting only the distinct ones).

The product of its digits is 48600, while the sum is 36.

The square root of 163361556 is about 12781.2971172726. The cubic root of 163361556 is about 546.6591483863.

The spelling of 163361556 in words is "one hundred sixty-three million, three hundred sixty-one thousand, five hundred fifty-six".