26315728217231 has 16 divisors (see below), whose sum is σ = 27210165559200. Its totient is φ = 25430955960960.

The previous prime is 26315728217221. The next prime is 26315728217267. The reversal of 26315728217231 is 13271282751362.

It is not a de Polignac number, because 26315728217231 - 2²² = 26315724022927 is a prime.

It is a super-2 number, since 2×26315728217231² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 26315728217231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26315728217221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86937776 + ... + 87239946.

It is an arithmetic number, because the mean of its divisors is an integer number (1700635347450).

Almost surely, 2^{26315728217231} is an apocalyptic number.

26315728217231 is a deficient number, since it is larger than the sum of its proper divisors (894437341969).

26315728217231 is a wasteful number, since it uses less digits than its factorization.

26315728217231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318154.

The product of its digits is 1693440, while the sum is 50.

The spelling of 26315728217231 in words is "twenty-six trillion, three hundred fifteen billion, seven hundred twenty-eight million, two hundred seventeen thousand, two hundred thirty-one".