26566026449 has 2 divisors, whose sum is σ = 26566026450. Its totient is φ = 26566026448.

The previous prime is 26566026401. The next prime is 26566026479. The reversal of 26566026449 is 94462066562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25531246225 + 1034780224 = 159785^2 + 32168^2 .

It is a cyclic number.

It is not a de Polignac number, because 26566026449 - 2¹⁶ = 26565960913 is a prime.

It is a super-2 number, since 2×26566026449² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 26566026397 and 26566026406.

It is not a weakly prime, because it can be changed into another prime (26566026479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13283013224 + 13283013225.

It is an arithmetic number, because the mean of its divisors is an integer number (13283013225).

Almost surely, 2^26566026449 is an apocalyptic number.

It is an amenable number.

26566026449 is a deficient number, since it is larger than the sum of its proper divisors (1).

26566026449 is an equidigital number, since it uses as much as digits as its factorization.

26566026449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3732480, while the sum is 50.

The spelling of 26566026449 in words is "twenty-six billion, five hundred sixty-six million, twenty-six thousand, four hundred forty-nine".