26920408297 has 2 divisors, whose sum is σ = 26920408298. Its totient is φ = 26920408296.

The previous prime is 26920408247. The next prime is 26920408303. The reversal of 26920408297 is 79280402962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26680282281 + 240126016 = 163341^2 + 15496^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26920408297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26920408297.

It is not a weakly prime, because it can be changed into another prime (26920408247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13460204148 + 13460204149.

It is an arithmetic number, because the mean of its divisors is an integer number (13460204149).

Almost surely, 2^26920408297 is an apocalyptic number.

It is an amenable number.

26920408297 is a deficient number, since it is larger than the sum of its proper divisors (1).

26920408297 is an equidigital number, since it uses as much as digits as its factorization.

26920408297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 26920408297 in words is "twenty-six billion, nine hundred twenty million, four hundred eight thousand, two hundred ninety-seven".