26909449687 has 2 divisors, whose sum is σ = 26909449688. Its totient is φ = 26909449686.

The previous prime is 26909449669. The next prime is 26909449691. The reversal of 26909449687 is 78694490962.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26909449687 - 2⁷ = 26909449559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26909449667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13454724843 + 13454724844.

It is an arithmetic number, because the mean of its divisors is an integer number (13454724844).

Almost surely, 2^26909449687 is an apocalyptic number.

26909449687 is a deficient number, since it is larger than the sum of its proper divisors (1).

26909449687 is an equidigital number, since it uses as much as digits as its factorization.

26909449687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47029248, while the sum is 64.

The spelling of 26909449687 in words is "twenty-six billion, nine hundred nine million, four hundred forty-nine thousand, six hundred eighty-seven".