26704809009 has 12 divisors (see below), whose sum is σ = 38578994116. Its totient is φ = 17800722432.

The previous prime is 26704808987. The next prime is 26704809017. The reversal of 26704809009 is 90090840762.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 11501919009 + 15202890000 = 107247^2 + 123300^2 .

It is not a de Polignac number, because 26704809009 - 2¹² = 26704804913 is a prime.

It is a super-3 number, since 3×26704809009³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26704809029) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 137644 + ... + 268989.

Almost surely, 2^26704809009 is an apocalyptic number.

It is an amenable number.

26704809009 is a deficient number, since it is larger than the sum of its proper divisors (11874185107).

26704809009 is a wasteful number, since it uses less digits than its factorization.

26704809009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413936 (or 413933 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The spelling of 26704809009 in words is "twenty-six billion, seven hundred four million, eight hundred nine thousand, nine".