786856949654591 has 2 divisors, whose sum is σ = 786856949654592. Its totient is φ = 786856949654590.

The previous prime is 786856949654483. The next prime is 786856949654593. The reversal of 786856949654591 is 195456949658687.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-786856949654591 is a prime.

Together with 786856949654593, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 786856949654591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (786856949654593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 393428474827295 + 393428474827296.

It is an arithmetic number, because the mean of its divisors is an integer number (393428474827296).

Almost surely, 2^{786856949654591} is an apocalyptic number.

786856949654591 is a deficient number, since it is larger than the sum of its proper divisors (1).

786856949654591 is an equidigital number, since it uses as much as digits as its factorization.

786856949654591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744000, while the sum is 92.

The spelling of 786856949654591 in words is "seven hundred eighty-six trillion, eight hundred fifty-six billion, nine hundred forty-nine million, six hundred fifty-four thousand, five hundred ninety-one".