813109862491 has 8 divisors (see below), whose sum is σ = 860085240480. Its totient is φ = 767103049152.

The previous prime is 813109862489. The next prime is 813109862533. The reversal of 813109862491 is 194268901318.

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

It is a cyclic number.

It is not a de Polignac number, because 813109862491 - 2¹ = 813109862489 is a prime.

It is a super-2 number, since 2×813109862491² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (813109862791) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 242139436 + ... + 242142793.

It is an arithmetic number, because the mean of its divisors is an integer number (107510655060).

Almost surely, 2^813109862491 is an apocalyptic number.

813109862491 is a deficient number, since it is larger than the sum of its proper divisors (46975377989).

813109862491 is a wasteful number, since it uses less digits than its factorization.

813109862491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484282325.

The product of its (nonzero) digits is 746496, while the sum is 52.

The spelling of 813109862491 in words is "eight hundred thirteen billion, one hundred nine million, eight hundred sixty-two thousand, four hundred ninety-one".