8397817855211 has 2 divisors, whose sum is σ = 8397817855212. Its totient is φ = 8397817855210.

The previous prime is 8397817855181. The next prime is 8397817855331. The reversal of 8397817855211 is 1125587187938.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8397817855211 is a prime.

It is not a weakly prime, because it can be changed into another prime (8397817855111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4198908927605 + 4198908927606.

It is an arithmetic number, because the mean of its divisors is an integer number (4198908927606).

Almost surely, 2^{8397817855211} is an apocalyptic number.

8397817855211 is a deficient number, since it is larger than the sum of its proper divisors (1).

8397817855211 is an equidigital number, since it uses as much as digits as its factorization.

8397817855211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33868800, while the sum is 65.

The spelling of 8397817855211 in words is "eight trillion, three hundred ninety-seven billion, eight hundred seventeen million, eight hundred fifty-five thousand, two hundred eleven".