163873578 has 16 divisors (see below), whose sum is σ = 357542496. Its totient is φ = 49658640.

The previous prime is 163873553. The next prime is 163873583. The reversal of 163873578 is 875378361.

163873578 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1241401 + ... + 1241532.

It is an arithmetic number, because the mean of its divisors is an integer number (22346406).

Almost surely, 2^163873578 is an apocalyptic number.

163873578 is an abundant number, since it is smaller than the sum of its proper divisors (193668918).

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

163873578 is a wasteful number, since it uses less digits than its factorization.

163873578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2482949.

The product of its digits is 846720, while the sum is 48.

The square root of 163873578 is about 12801.3115734287. The cubic root of 163873578 is about 547.2296816151.

It can be divided in two parts, 163873 and 578, that added together give a triangular number (164451 = T₅₇₃).

The spelling of 163873578 in words is "one hundred sixty-three million, eight hundred seventy-three thousand, five hundred seventy-eight".