26924459991809 has 2 divisors, whose sum is σ = 26924459991810. Its totient is φ = 26924459991808.

The previous prime is 26924459991761. The next prime is 26924459991817. The reversal of 26924459991809 is 90819995442962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25727466450625 + 1196993541184 = 5072225^2 + 1094072^2 .

It is a cyclic number.

It is not a de Polignac number, because 26924459991809 - 2¹² = 26924459987713 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26924459991809.

It is not a weakly prime, because it can be changed into another prime (26924459991899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13462229995904 + 13462229995905.

It is an arithmetic number, because the mean of its divisors is an integer number (13462229995905).

Almost surely, 2^{26924459991809} is an apocalyptic number.

It is an amenable number.

26924459991809 is a deficient number, since it is larger than the sum of its proper divisors (1).

26924459991809 is an equidigital number, since it uses as much as digits as its factorization.

26924459991809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 906992640, while the sum is 77.

The spelling of 26924459991809 in words is "twenty-six trillion, nine hundred twenty-four billion, four hundred fifty-nine million, nine hundred ninety-one thousand, eight hundred nine".