394664481775 has 6 divisors (see below), whose sum is σ = 489383957432. Its totient is φ = 315731585400.

The previous prime is 394664481773. The next prime is 394664481781. The reversal of 394664481775 is 577184466493.

It is not a de Polignac number, because 394664481775 - 2¹ = 394664481773 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394664481773) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7893289611 + ... + 7893289660.

Almost surely, 2^394664481775 is an apocalyptic number.

394664481775 is a deficient number, since it is larger than the sum of its proper divisors (94719475657).

394664481775 is a wasteful number, since it uses less digits than its factorization.

394664481775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15786579281 (or 15786579276 counting only the distinct ones).

The product of its digits is 121927680, while the sum is 64.

The spelling of 394664481775 in words is "three hundred ninety-four billion, six hundred sixty-four million, four hundred eighty-one thousand, seven hundred seventy-five".