26026400497 has 2 divisors, whose sum is σ = 26026400498. Its totient is φ = 26026400496.

The previous prime is 26026400489. The next prime is 26026400509. The reversal of 26026400497 is 79400462062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24880645696 + 1145754801 = 157736^2 + 33849^2 .

It is a cyclic number.

It is not a de Polignac number, because 26026400497 - 2³ = 26026400489 is a prime.

It is not a weakly prime, because it can be changed into another prime (26026400437) 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, 13013200248 + 13013200249.

It is an arithmetic number, because the mean of its divisors is an integer number (13013200249).

Almost surely, 2^26026400497 is an apocalyptic number.

It is an amenable number.

26026400497 is a deficient number, since it is larger than the sum of its proper divisors (1).

26026400497 is an equidigital number, since it uses as much as digits as its factorization.

26026400497 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152, while the sum is 40.

The spelling of 26026400497 in words is "twenty-six billion, twenty-six million, four hundred thousand, four hundred ninety-seven".