26564655473 has 2 divisors, whose sum is σ = 26564655474. Its totient is φ = 26564655472.

The previous prime is 26564655433. The next prime is 26564655569. The reversal of 26564655473 is 37455646562.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20366714944 + 6197940529 = 142712^2 + 78727^2 .

It is a cyclic number.

It is not a de Polignac number, because 26564655473 - 2⁶ = 26564655409 is a prime.

It is not a weakly prime, because it can be changed into another prime (26564655433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13282327736 + 13282327737.

It is an arithmetic number, because the mean of its divisors is an integer number (13282327737).

Almost surely, 2^26564655473 is an apocalyptic number.

It is an amenable number.

26564655473 is a deficient number, since it is larger than the sum of its proper divisors (1).

26564655473 is an equidigital number, since it uses as much as digits as its factorization.

26564655473 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144000, while the sum is 53.

The spelling of 26564655473 in words is "twenty-six billion, five hundred sixty-four million, six hundred fifty-five thousand, four hundred seventy-three".