26640507211 has 2 divisors, whose sum is σ = 26640507212. Its totient is φ = 26640507210.

The previous prime is 26640507193. The next prime is 26640507277. The reversal of 26640507211 is 11270504662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26640507211 - 2⁹ = 26640506699 is a prime.

It is not a weakly prime, because it can be changed into another prime (26640577211) 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, 13320253605 + 13320253606.

It is an arithmetic number, because the mean of its divisors is an integer number (13320253606).

Almost surely, 2^26640507211 is an apocalyptic number.

26640507211 is a deficient number, since it is larger than the sum of its proper divisors (1).

26640507211 is an equidigital number, since it uses as much as digits as its factorization.

26640507211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 34.

The spelling of 26640507211 in words is "twenty-six billion, six hundred forty million, five hundred seven thousand, two hundred eleven".