26579472217 has 2 divisors, whose sum is σ = 26579472218. Its totient is φ = 26579472216.

The previous prime is 26579472187. The next prime is 26579472277. The reversal of 26579472217 is 71227497562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21194701056 + 5384771161 = 145584^2 + 73381^2 .

It is a cyclic number.

It is not a de Polignac number, because 26579472217 - 2⁷ = 26579472089 is a prime.

It is not a weakly prime, because it can be changed into another prime (26579472277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13289736108 + 13289736109.

It is an arithmetic number, because the mean of its divisors is an integer number (13289736109).

Almost surely, 2^26579472217 is an apocalyptic number.

It is an amenable number.

26579472217 is a deficient number, since it is larger than the sum of its proper divisors (1).

26579472217 is an equidigital number, since it uses as much as digits as its factorization.

26579472217 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2963520, while the sum is 52.

The spelling of 26579472217 in words is "twenty-six billion, five hundred seventy-nine million, four hundred seventy-two thousand, two hundred seventeen".