26831776409 has 2 divisors, whose sum is σ = 26831776410. Its totient is φ = 26831776408.

The previous prime is 26831776403. The next prime is 26831776417. The reversal of 26831776409 is 90467713862.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26582041600 + 249734809 = 163040^2 + 15803^2 .

It is a cyclic number.

It is not a de Polignac number, because 26831776409 - 2²⁸ = 26563340953 is a prime.

It is not a weakly prime, because it can be changed into another prime (26831776403) 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, 13415888204 + 13415888205.

It is an arithmetic number, because the mean of its divisors is an integer number (13415888205).

Almost surely, 2^26831776409 is an apocalyptic number.

It is an amenable number.

26831776409 is a deficient number, since it is larger than the sum of its proper divisors (1).

26831776409 is an equidigital number, since it uses as much as digits as its factorization.

26831776409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 26831776409 in words is "twenty-six billion, eight hundred thirty-one million, seven hundred seventy-six thousand, four hundred nine".