813830081391 has 12 divisors (see below), whose sum is σ = 1179240647832. Its totient is φ = 540841860816.

The previous prime is 813830081371. The next prime is 813830081429. The reversal of 813830081391 is 193180038318.

It is not a de Polignac number, because 813830081391 - 2¹⁰ = 813830080367 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813830081371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142624221 + ... + 142629926.

It is an arithmetic number, because the mean of its divisors is an integer number (98270053986).

Almost surely, 2^813830081391 is an apocalyptic number.

813830081391 is a deficient number, since it is larger than the sum of its proper divisors (365410566441).

813830081391 is a wasteful number, since it uses less digits than its factorization.

813830081391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285254470 (or 285254467 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 45.

The spelling of 813830081391 in words is "eight hundred thirteen billion, eight hundred thirty million, eighty-one thousand, three hundred ninety-one".