394564984351 has 16 divisors (see below), whose sum is σ = 408005111808. Its totient is φ = 381169958400.

The previous prime is 394564984321. The next prime is 394564984379. The reversal of 394564984351 is 153489465493.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 394564984351 - 2²³ = 394556595743 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 394564984351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394564984321) 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, 58097766 + ... + 58104556.

It is an arithmetic number, because the mean of its divisors is an integer number (25500319488).

Almost surely, 2^394564984351 is an apocalyptic number.

394564984351 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

394564984351 is a deficient number, since it is larger than the sum of its proper divisors (13440127457).

394564984351 is a wasteful number, since it uses less digits than its factorization.

394564984351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9822.

The product of its digits is 55987200, while the sum is 61.

The spelling of 394564984351 in words is "three hundred ninety-four billion, five hundred sixty-four million, nine hundred eighty-four thousand, three hundred fifty-one".