26940133309 has 2 divisors, whose sum is σ = 26940133310. Its totient is φ = 26940133308.

The previous prime is 26940133273. The next prime is 26940133331. The reversal of 26940133309 is 90333104962.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26800964100 + 139169209 = 163710^2 + 11797^2 .

It is a cyclic number.

It is not a de Polignac number, because 26940133309 - 2²⁷ = 26805915581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26940133349) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13470066654 + 13470066655.

It is an arithmetic number, because the mean of its divisors is an integer number (13470066655).

Almost surely, 2^26940133309 is an apocalyptic number.

It is an amenable number.

26940133309 is a deficient number, since it is larger than the sum of its proper divisors (1).

26940133309 is an equidigital number, since it uses as much as digits as its factorization.

26940133309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 104976, while the sum is 40.

The spelling of 26940133309 in words is "twenty-six billion, nine hundred forty million, one hundred thirty-three thousand, three hundred nine".