8420134713791 has 2 divisors, whose sum is σ = 8420134713792. Its totient is φ = 8420134713790.

The previous prime is 8420134713721. The next prime is 8420134713821. The reversal of 8420134713791 is 1973174310248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 8420134713791 - 2¹⁴ = 8420134697407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8420134713721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4210067356895 + 4210067356896.

It is an arithmetic number, because the mean of its divisors is an integer number (4210067356896).

Almost surely, 2^{8420134713791} is an apocalyptic number.

8420134713791 is a deficient number, since it is larger than the sum of its proper divisors (1).

8420134713791 is an equidigital number, since it uses as much as digits as its factorization.

8420134713791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1016064, while the sum is 50.

The spelling of 8420134713791 in words is "eight trillion, four hundred twenty billion, one hundred thirty-four million, seven hundred thirteen thousand, seven hundred ninety-one".