194971396842 has 160 divisors (see below), whose sum is σ = 462575836800. Its totient is φ = 61255180800.

The previous prime is 194971396831. The next prime is 194971396861. The reversal of 194971396842 is 248693179491.

194971396842 is a `hidden beast` number, since 1 + 9 + 497 + 13 + 96 + 8 + 42 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 194971396842.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 185863534 + ... + 185864582.

It is an arithmetic number, because the mean of its divisors is an integer number (2891098980).

Almost surely, 2^194971396842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194971396842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231287918400).

194971396842 is an abundant number, since it is smaller than the sum of its proper divisors (267604439958).

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

194971396842 is a wasteful number, since it uses less digits than its factorization.

194971396842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770 (or 1761 counting only the distinct ones).

The product of its digits is 23514624, while the sum is 63.

The spelling of 194971396842 in words is "one hundred ninety-four billion, nine hundred seventy-one million, three hundred ninety-six thousand, eight hundred forty-two".