785816983631 has 2 divisors, whose sum is σ = 785816983632. Its totient is φ = 785816983630.

The previous prime is 785816983621. The next prime is 785816983657. The reversal of 785816983631 is 136389618587.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-785816983631 is a prime.

It is a super-2 number, since 2×785816983631² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (785816983621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 392908491815 + 392908491816.

It is an arithmetic number, because the mean of its divisors is an integer number (392908491816).

Almost surely, 2^785816983631 is an apocalyptic number.

785816983631 is a deficient number, since it is larger than the sum of its proper divisors (1).

785816983631 is an equidigital number, since it uses as much as digits as its factorization.

785816983631 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 65.

The spelling of 785816983631 in words is "seven hundred eighty-five billion, eight hundred sixteen million, nine hundred eighty-three thousand, six hundred thirty-one".