194415275309 has 16 divisors (see below), whose sum is σ = 208277945280. Its totient is φ = 181433465136.

The previous prime is 194415275287. The next prime is 194415275317. The reversal of 194415275309 is 903572514491.

It is not a de Polignac number, because 194415275309 - 2²⁰ = 194414226733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194415275209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 248027 + ... + 671079.

It is an arithmetic number, because the mean of its divisors is an integer number (13017371580).

Almost surely, 2^194415275309 is an apocalyptic number.

194415275309 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

194415275309 is a deficient number, since it is larger than the sum of its proper divisors (13862669971).

194415275309 is an frugal number, since it uses more digits than its factorization.

194415275309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423177 (or 423139 counting only the distinct ones).

The product of its (nonzero) digits is 1360800, while the sum is 50.

The spelling of 194415275309 in words is "one hundred ninety-four billion, four hundred fifteen million, two hundred seventy-five thousand, three hundred nine".