194605857199 has 12 divisors (see below), whose sum is σ = 212262062376. Its totient is φ = 177362226288.

The previous prime is 194605857197. The next prime is 194605857283. The reversal of 194605857199 is 991758506491.

It is not a de Polignac number, because 194605857199 - 2¹ = 194605857197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194605857199.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194605857197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1118169 + ... + 1280434.

It is an arithmetic number, because the mean of its divisors is an integer number (17688505198).

Almost surely, 2^194605857199 is an apocalyptic number.

194605857199 is a deficient number, since it is larger than the sum of its proper divisors (17656205177).

194605857199 is an equidigital number, since it uses as much as digits as its factorization.

194605857199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2398774 (or 2398695 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 64.

The spelling of 194605857199 in words is "one hundred ninety-four billion, six hundred five million, eight hundred fifty-seven thousand, one hundred ninety-nine".