194788394874 has 12 divisors (see below), whose sum is σ = 422041522266. Its totient is φ = 64929464952.

The previous prime is 194788394861. The next prime is 194788394963. The reversal of 194788394874 is 478493887491.

194788394874 is a `hidden beast` number, since 1 + 9 + 478 + 83 + 9 + 4 + 8 + 74 = 666.

It can be written as a sum of positive squares in only one way, i.e., 178120293849 + 16668101025 = 422043^2 + 129105^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5410788729 + ... + 5410788764.

Almost surely, 2^194788394874 is an apocalyptic number.

194788394874 is an abundant number, since it is smaller than the sum of its proper divisors (227253127392).

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

194788394874 is a wasteful number, since it uses less digits than its factorization.

194788394874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10821577501 (or 10821577498 counting only the distinct ones).

The product of its digits is 390168576, while the sum is 72.

The spelling of 194788394874 in words is "one hundred ninety-four billion, seven hundred eighty-eight million, three hundred ninety-four thousand, eight hundred seventy-four".