394564361831 has 8 divisors (see below), whose sum is σ = 417791460384. Its totient is φ = 371339200000.

The previous prime is 394564361743. The next prime is 394564361839. The reversal of 394564361831 is 138163465493.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-394564361831 is a prime.

It is a super-2 number, since 2×394564361831² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394564361839) 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, 53795 + ... + 889956.

It is an arithmetic number, because the mean of its divisors is an integer number (52223932548).

Almost surely, 2^394564361831 is an apocalyptic number.

394564361831 is a deficient number, since it is larger than the sum of its proper divisors (23227098553).

394564361831 is a wasteful number, since it uses less digits than its factorization.

394564361831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 968361.

The product of its digits is 5598720, while the sum is 53.

The spelling of 394564361831 in words is "three hundred ninety-four billion, five hundred sixty-four million, three hundred sixty-one thousand, eight hundred thirty-one".