813831856453 has 24 divisors (see below), whose sum is σ = 1042991692704. Its totient is φ = 627875892000.

The previous prime is 813831856441. The next prime is 813831856489. The reversal of 813831856453 is 354658138318.

It is not a de Polignac number, because 813831856453 - 2⁵ = 813831856421 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 813831856394 and 813831856403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813831856493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7420275 + ... + 7529152.

It is an arithmetic number, because the mean of its divisors is an integer number (43457987196).

Almost surely, 2^813831856453 is an apocalyptic number.

It is an amenable number.

813831856453 is a deficient number, since it is larger than the sum of its proper divisors (229159836251).

813831856453 is a wasteful number, since it uses less digits than its factorization.

813831856453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14949553 (or 14949546 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 55.

The spelling of 813831856453 in words is "eight hundred thirteen billion, eight hundred thirty-one million, eight hundred fifty-six thousand, four hundred fifty-three".