194939771364 has 120 divisors (see below), whose sum is σ = 549093654648. Its totient is φ = 59950679040.

The previous prime is 194939771309. The next prime is 194939771399. The reversal of 194939771364 is 463177939491.

194939771364 is a `hidden beast` number, since 1 + 9 + 493 + 9 + 7 + 7 + 136 + 4 = 666.

194939771364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 17833465764 + 177106305600 = 133542^2 + 420840^2 .

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 39 ways as a sum of consecutive naturals, for example, 9007084 + ... + 9028700.

Almost surely, 2^194939771364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194939771364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (274546827324).

194939771364 is an abundant number, since it is smaller than the sum of its proper divisors (354153883284).

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

194939771364 is a wasteful number, since it uses less digits than its factorization.

194939771364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23787 (or 23776 counting only the distinct ones).

The product of its digits is 30862944, while the sum is 63.

The spelling of 194939771364 in words is "one hundred ninety-four billion, nine hundred thirty-nine million, seven hundred seventy-one thousand, three hundred sixty-four".