316394839681 has 4 divisors (see below), whose sum is σ = 326601124864. Its totient is φ = 306188554500.

The previous prime is 316394839679. The next prime is 316394839759. The reversal of 316394839681 is 186938493613.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 186938493613 = 218761 ⋅854533.

It is a cyclic number.

It is not a de Polignac number, because 316394839681 - 2¹ = 316394839679 is a prime.

It is a super-2 number, since 2×316394839681² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316394830681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5103142545 + ... + 5103142606.

It is an arithmetic number, because the mean of its divisors is an integer number (81650281216).

Almost surely, 2^316394839681 is an apocalyptic number.

316394839681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

316394839681 is a deficient number, since it is larger than the sum of its proper divisors (10206285183).

316394839681 is a wasteful number, since it uses less digits than its factorization.

316394839681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10206285182.

The product of its digits is 20155392, while the sum is 61.

The spelling of 316394839681 in words is "three hundred sixteen billion, three hundred ninety-four million, eight hundred thirty-nine thousand, six hundred eighty-one".