194041391249 has 4 divisors (see below), whose sum is σ = 194042943780. Its totient is φ = 194039838720.

The previous prime is 194041391231. The next prime is 194041391261. The reversal of 194041391249 is 942193140491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31128250624 + 162913140625 = 176432^2 + 403625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194041391249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194041391209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570632 + ... + 844809.

It is an arithmetic number, because the mean of its divisors is an integer number (48510735945).

Almost surely, 2^194041391249 is an apocalyptic number.

It is an amenable number.

194041391249 is a deficient number, since it is larger than the sum of its proper divisors (1552531).

194041391249 is a wasteful number, since it uses less digits than its factorization.

194041391249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552530.

The product of its (nonzero) digits is 279936, while the sum is 47.

The spelling of 194041391249 in words is "one hundred ninety-four billion, forty-one million, three hundred ninety-one thousand, two hundred forty-nine".