163378172 has 12 divisors (see below), whose sum is σ = 286142640. Its totient is φ = 81623136.

The previous prime is 163378151. The next prime is 163378219. The reversal of 163378172 is 271873361.

It is a super-3 number, since 3×163378172³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10688 + ... + 20999.

It is an arithmetic number, because the mean of its divisors is an integer number (23845220).

Almost surely, 2^163378172 is an apocalyptic number.

It is an amenable number.

163378172 is a deficient number, since it is larger than the sum of its proper divisors (122764468).

163378172 is a wasteful number, since it uses less digits than its factorization.

163378172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32980 (or 32978 counting only the distinct ones).

The product of its digits is 42336, while the sum is 38.

The square root of 163378172 is about 12781.9471130184. The cubic root of 163378172 is about 546.6776818786.

The spelling of 163378172 in words is "one hundred sixty-three million, three hundred seventy-eight thousand, one hundred seventy-two".