26345477454409 has 2 divisors, whose sum is σ = 26345477454410. Its totient is φ = 26345477454408.

The previous prime is 26345477454319. The next prime is 26345477454433. The reversal of 26345477454409 is 90445477454362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26320716858384 + 24760596025 = 5130372^2 + 157355^2 .

It is a cyclic number.

It is not a de Polignac number, because 26345477454409 - 2¹³ = 26345477446217 is a prime.

It is not a weakly prime, because it can be changed into another prime (26345477454479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13172738727204 + 13172738727205.

It is an arithmetic number, because the mean of its divisors is an integer number (13172738727205).

Almost surely, 2^{26345477454409} is an apocalyptic number.

It is an amenable number.

26345477454409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26345477454409 is an equidigital number, since it uses as much as digits as its factorization.

26345477454409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 406425600, while the sum is 64.

The spelling of 26345477454409 in words is "twenty-six trillion, three hundred forty-five billion, four hundred seventy-seven million, four hundred fifty-four thousand, four hundred nine".