6394420306931 has 8 divisors (see below), whose sum is σ = 6467610544560. Its totient is φ = 6321259909888.

The previous prime is 6394420306921. The next prime is 6394420306999. The reversal of 6394420306931 is 1396030244936.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6394420306931 - 2²² = 6394416112627 is a prime.

It is a super-2 number, since 2×6394420306931² (a number of 26 digits) contains 22 as substring.

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 6394420306931.

It is not an unprimeable number, because it can be changed into a prime (6394420306921) 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, 7028981 + ... + 7886406.

It is an arithmetic number, because the mean of its divisors is an integer number (808451318070).

Almost surely, 2^{6394420306931} is an apocalyptic number.

6394420306931 is a deficient number, since it is larger than the sum of its proper divisors (73190237629).

6394420306931 is a wasteful number, since it uses less digits than its factorization.

6394420306931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14920293.

The product of its (nonzero) digits is 2519424, while the sum is 50.

The spelling of 6394420306931 in words is "six trillion, three hundred ninety-four billion, four hundred twenty million, three hundred six thousand, nine hundred thirty-one".