826440689099 has 2 divisors, whose sum is σ = 826440689100. Its totient is φ = 826440689098.

The previous prime is 826440689089. The next prime is 826440689147. The reversal of 826440689099 is 990986044628.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 826440689099 - 2¹² = 826440685003 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (826440689029) 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, 413220344549 + 413220344550.

It is an arithmetic number, because the mean of its divisors is an integer number (413220344550).

Almost surely, 2^826440689099 is an apocalyptic number.

826440689099 is a deficient number, since it is larger than the sum of its proper divisors (1).

826440689099 is an equidigital number, since it uses as much as digits as its factorization.

826440689099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 53747712, while the sum is 65.

The spelling of 826440689099 in words is "eight hundred twenty-six billion, four hundred forty million, six hundred eighty-nine thousand, ninety-nine".