163151568 has 30 divisors (see below), whose sum is σ = 456598194. Its totient is φ = 54383808.

The previous prime is 163151561. The next prime is 163151609. The reversal of 163151568 is 865151361.

163151568 is a `hidden beast` number, since 1 + 631 + 5 + 15 + 6 + 8 = 666.

It can be written as a sum of positive squares in only one way, i.e., 139996224 + 23155344 = 11832^2 + 4812^2 .

It is a super-4 number, since 4×163151568⁴ (a number of 34 digits) contains 4444 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163151561) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 566355 + ... + 566642.

Almost surely, 2^163151568 is an apocalyptic number.

163151568 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

163151568 is an abundant number, since it is smaller than the sum of its proper divisors (293446626).

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

163151568 is a wasteful number, since it uses less digits than its factorization.

163151568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133011 (or 1133002 counting only the distinct ones).

The product of its digits is 21600, while the sum is 36.

The square root of 163151568 is about 12773.0798165517. The cubic root of 163151568 is about 546.4248193221.

The spelling of 163151568 in words is "one hundred sixty-three million, one hundred fifty-one thousand, five hundred sixty-eight".