163181253894 has 16 divisors (see below), whose sum is σ = 326424114432. Its totient is φ = 54383483528.

The previous prime is 163181253889. The next prime is 163181253929. The reversal of 163181253894 is 498352181361.

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, 2532474 + ... + 2596109.

It is an arithmetic number, because the mean of its divisors is an integer number (20401507152).

Almost surely, 2^163181253894 is an apocalyptic number.

163181253894 is an abundant number, since it is smaller than the sum of its proper divisors (163242860538).

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

163181253894 is a wasteful number, since it uses less digits than its factorization.

163181253894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5133891.

The product of its digits is 1244160, while the sum is 51.

The spelling of 163181253894 in words is "one hundred sixty-three billion, one hundred eighty-one million, two hundred fifty-three thousand, eight hundred ninety-four".