8079812457217 has 2 divisors, whose sum is σ = 8079812457218. Its totient is φ = 8079812457216.

The previous prime is 8079812457109. The next prime is 8079812457221. The reversal of 8079812457217 is 7127542189708.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4318815486976 + 3760996970241 = 2078176^2 + 1939329^2 .

It is a cyclic number.

It is not a de Polignac number, because 8079812457217 - 2¹⁵ = 8079812424449 is a prime.

It is not a weakly prime, because it can be changed into another prime (8079812457287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4039906228608 + 4039906228609.

It is an arithmetic number, because the mean of its divisors is an integer number (4039906228609).

Almost surely, 2^{8079812457217} is an apocalyptic number.

It is an amenable number.

8079812457217 is a deficient number, since it is larger than the sum of its proper divisors (1).

8079812457217 is an equidigital number, since it uses as much as digits as its factorization.

8079812457217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15805440, while the sum is 61.

The spelling of 8079812457217 in words is "eight trillion, seventy-nine billion, eight hundred twelve million, four hundred fifty-seven thousand, two hundred seventeen".