813891326253 has 8 divisors (see below), whose sum is σ = 1086599606400. Its totient is φ = 541888631808.

The previous prime is 813891326249. The next prime is 813891326327. The reversal of 813891326253 is 352623198318.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 813891326253 - 2² = 813891326249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 813891326196 and 813891326205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813891326203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176393733 + ... + 176398346.

It is an arithmetic number, because the mean of its divisors is an integer number (135824950800).

Almost surely, 2^813891326253 is an apocalyptic number.

It is an amenable number.

813891326253 is a deficient number, since it is larger than the sum of its proper divisors (272708280147).

813891326253 is a wasteful number, since it uses less digits than its factorization.

813891326253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352792851.

The product of its digits is 1866240, while the sum is 51.

The spelling of 813891326253 in words is "eight hundred thirteen billion, eight hundred ninety-one million, three hundred twenty-six thousand, two hundred fifty-three".