8199691806613 has 2 divisors, whose sum is σ = 8199691806614. Its totient is φ = 8199691806612.

The previous prime is 8199691806589. The next prime is 8199691806739. The reversal of 8199691806613 is 3166081969918.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6733853731089 + 1465838075524 = 2594967^2 + 1210718^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8199691806613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8199691806113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4099845903306 + 4099845903307.

It is an arithmetic number, because the mean of its divisors is an integer number (4099845903307).

Almost surely, 2^{8199691806613} is an apocalyptic number.

It is an amenable number.

8199691806613 is a deficient number, since it is larger than the sum of its proper divisors (1).

8199691806613 is an equidigital number, since it uses as much as digits as its factorization.

8199691806613 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30233088, while the sum is 67.

The spelling of 8199691806613 in words is "eight trillion, one hundred ninety-nine billion, six hundred ninety-one million, eight hundred six thousand, six hundred thirteen".