811216590613 has 32 divisors (see below), whose sum is σ = 969738682752. Its totient is φ = 668836742400.

The previous prime is 811216590599. The next prime is 811216590659. The reversal of 811216590613 is 316095612118.

811216590613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-811216590613 is a prime.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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 811216590613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811216591613) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7860495 + ... + 7963027.

It is an arithmetic number, because the mean of its divisors is an integer number (30304333836).

Almost surely, 2^811216590613 is an apocalyptic number.

It is an amenable number.

811216590613 is a deficient number, since it is larger than the sum of its proper divisors (158522092139).

811216590613 is a wasteful number, since it uses less digits than its factorization.

811216590613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103525.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 811216590613 in words is "eight hundred eleven billion, two hundred sixteen million, five hundred ninety thousand, six hundred thirteen".