26009309812 has 6 divisors (see below), whose sum is σ = 45516292178. Its totient is φ = 13004654904.

The previous prime is 26009309773. The next prime is 26009309863. The reversal of 26009309812 is 21890390062.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 17829192676 + 8180117136 = 133526^2 + 90444^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3251163723 + ... + 3251163730.

Almost surely, 2^26009309812 is an apocalyptic number.

It is an amenable number.

26009309812 is a deficient number, since it is larger than the sum of its proper divisors (19506982366).

26009309812 is a wasteful number, since it uses less digits than its factorization.

26009309812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6502327457 (or 6502327455 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 40.

Adding to 26009309812 its reverse (21890390062), we get a palindrome (47899699874).

The spelling of 26009309812 in words is "twenty-six billion, nine million, three hundred nine thousand, eight hundred twelve".