394809497506 has 16 divisors (see below), whose sum is σ = 603649568448. Its totient is φ = 193596202800.

The previous prime is 394809497477. The next prime is 394809497507. The reversal of 394809497506 is 605794908493.

It is not an unprimeable number, because it can be changed into a prime (394809497507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560880 + ... + 1050811.

It is an arithmetic number, because the mean of its divisors is an integer number (37728098028).

Almost surely, 2^394809497506 is an apocalyptic number.

394809497506 is a deficient number, since it is larger than the sum of its proper divisors (208840070942).

394809497506 is a wasteful number, since it uses less digits than its factorization.

394809497506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614057.

The product of its (nonzero) digits is 58786560, while the sum is 64.

The spelling of 394809497506 in words is "three hundred ninety-four billion, eight hundred nine million, four hundred ninety-seven thousand, five hundred six".