394741320805 has 16 divisors (see below), whose sum is σ = 510141890160. Its totient is φ = 291492914688.

The previous prime is 394741320793. The next prime is 394741320821. The reversal of 394741320805 is 508023147493.

It can be written as a sum of positive squares in 8 ways, for example, as 28918362916 + 365822957889 = 170054^2 + 604833^2 .

It is a cyclic number.

It is not a de Polignac number, because 394741320805 - 2¹⁹ = 394740796517 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3063969 + ... + 3190201.

It is an arithmetic number, because the mean of its divisors is an integer number (31883868135).

Almost surely, 2^394741320805 is an apocalyptic number.

It is an amenable number.

394741320805 is a deficient number, since it is larger than the sum of its proper divisors (115400569355).

394741320805 is a wasteful number, since it uses less digits than its factorization.

394741320805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174360.

The product of its (nonzero) digits is 725760, while the sum is 46.

The spelling of 394741320805 in words is "three hundred ninety-four billion, seven hundred forty-one million, three hundred twenty thousand, eight hundred five".