26315823991 has 2 divisors, whose sum is σ = 26315823992. Its totient is φ = 26315823990.

The previous prime is 26315823979. The next prime is 26315824009. The reversal of 26315823991 is 19932851362.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26315823991 - 2¹¹ = 26315821943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26315823901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13157911995 + 13157911996.

It is an arithmetic number, because the mean of its divisors is an integer number (13157911996).

Almost surely, 2^26315823991 is an apocalyptic number.

26315823991 is a deficient number, since it is larger than the sum of its proper divisors (1).

26315823991 is an equidigital number, since it uses as much as digits as its factorization.

26315823991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 699840, while the sum is 49.

The spelling of 26315823991 in words is "twenty-six billion, three hundred fifteen million, eight hundred twenty-three thousand, nine hundred ninety-one".