8197891067567 has 2 divisors, whose sum is σ = 8197891067568. Its totient is φ = 8197891067566.

The previous prime is 8197891067497. The next prime is 8197891067621. The reversal of 8197891067567 is 7657601987918.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8197891067567 - 2³⁶ = 8129171590831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 8197891067494 and 8197891067503.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8197891067467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4098945533783 + 4098945533784.

It is an arithmetic number, because the mean of its divisors is an integer number (4098945533784).

Almost surely, 2^{8197891067567} is an apocalyptic number.

8197891067567 is a deficient number, since it is larger than the sum of its proper divisors (1).

8197891067567 is an equidigital number, since it uses as much as digits as its factorization.

8197891067567 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 320060160, while the sum is 74.

The spelling of 8197891067567 in words is "eight trillion, one hundred ninety-seven billion, eight hundred ninety-one million, sixty-seven thousand, five hundred sixty-seven".