26315909551 has 4 divisors (see below), whose sum is σ = 26327520072. Its totient is φ = 26304299032.

The previous prime is 26315909531. The next prime is 26315909561. The reversal of 26315909551 is 15590951362.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 26315909551 - 2⁵ = 26315909519 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26315909531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5801860 + ... + 5806393.

It is an arithmetic number, because the mean of its divisors is an integer number (6581880018).

Almost surely, 2^26315909551 is an apocalyptic number.

26315909551 is a deficient number, since it is larger than the sum of its proper divisors (11610521).

26315909551 is a wasteful number, since it uses less digits than its factorization.

26315909551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11610520.

The product of its (nonzero) digits is 364500, while the sum is 46.

The spelling of 26315909551 in words is "twenty-six billion, three hundred fifteen million, nine hundred nine thousand, five hundred fifty-one".