813287256611 has 8 divisors (see below), whose sum is σ = 841342263120. Its totient is φ = 785232958048.

The previous prime is 813287256571. The next prime is 813287256629. The reversal of 813287256611 is 116652782318.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-813287256611 is a prime.

It is a super-2 number, since 2×813287256611² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 813287256611.

It is not an unprimeable number, because it can be changed into a prime (813287256631) 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, 3355565 + ... + 3589761.

It is an arithmetic number, because the mean of its divisors is an integer number (105167782890).

Almost surely, 2^813287256611 is an apocalyptic number.

813287256611 is a deficient number, since it is larger than the sum of its proper divisors (28055006509).

813287256611 is a wasteful number, since it uses less digits than its factorization.

813287256611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353973.

The product of its digits is 967680, while the sum is 50.

The spelling of 813287256611 in words is "eight hundred thirteen billion, two hundred eighty-seven million, two hundred fifty-six thousand, six hundred eleven".