169931381994 has 24 divisors (see below), whose sum is σ = 401655994272. Its totient is φ = 51494358120.

The previous prime is 169931381981. The next prime is 169931382043. The reversal of 169931381994 is 499183139961.

169931381994 is a `hidden beast` number, since 169 + 9 + 3 + 1 + 381 + 9 + 94 = 666.

169931381994 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 11 ways as a sum of consecutive naturals, for example, 429119454 + ... + 429119849.

It is an arithmetic number, because the mean of its divisors is an integer number (16735666428).

Almost surely, 2^169931381994 is an apocalyptic number.

169931381994 is an abundant number, since it is smaller than the sum of its proper divisors (231724612278).

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

169931381994 is a wasteful number, since it uses less digits than its factorization.

169931381994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858239322 (or 858239319 counting only the distinct ones).

The product of its digits is 11337408, while the sum is 63.

The spelling of 169931381994 in words is "one hundred sixty-nine billion, nine hundred thirty-one million, three hundred eighty-one thousand, nine hundred ninety-four".