163968235878 has 32 divisors (see below), whose sum is σ = 336554380800. Its totient is φ = 53236758816.

The previous prime is 163968235853. The next prime is 163968235903. The reversal of 163968235878 is 878532869361.

It is an interprime number because it is at equal distance from previous prime (163968235853) and next prime (163968235903).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2086126 + ... + 2163297.

It is an arithmetic number, because the mean of its divisors is an integer number (10517324400).

Almost surely, 2^163968235878 is an apocalyptic number.

163968235878 is an abundant number, since it is smaller than the sum of its proper divisors (172586144922).

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

163968235878 is a wasteful number, since it uses less digits than its factorization.

163968235878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249596.

The product of its digits is 104509440, while the sum is 66.

The spelling of 163968235878 in words is "one hundred sixty-three billion, nine hundred sixty-eight million, two hundred thirty-five thousand, eight hundred seventy-eight".