26315178793889 has 4 divisors (see below), whose sum is σ = 26319033375024. Its totient is φ = 26311324212756.

The previous prime is 26315178793877. The next prime is 26315178793957. The reversal of 26315178793889 is 98839787151362.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 26315178793889 - 2³² = 26310883826593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26315178793859) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1927280327 + ... + 1927293980.

It is an arithmetic number, because the mean of its divisors is an integer number (6579758343756).

Almost surely, 2^{26315178793889} is an apocalyptic number.

It is an amenable number.

26315178793889 is a deficient number, since it is larger than the sum of its proper divisors (3854581135).

26315178793889 is an equidigital number, since it uses as much as digits as its factorization.

26315178793889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3854581134.

The product of its digits is 1097349120, while the sum is 77.

The spelling of 26315178793889 in words is "twenty-six trillion, three hundred fifteen billion, one hundred seventy-eight million, seven hundred ninety-three thousand, eight hundred eighty-nine".