26894811685617 has 12 divisors (see below), whose sum is σ = 38848111782480. Its totient is φ = 17929851168408.

The previous prime is 26894811685583. The next prime is 26894811685627. The reversal of 26894811685617 is 71658611849862.

It is a happy number.

26894811685617 is a `hidden beast` number, since 2 + 6 + 8 + 9 + 48 + 1 + 16 + 8 + 561 + 7 = 666.

It is not a de Polignac number, because 26894811685617 - 2¹⁶ = 26894811620081 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26894811685627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8116234 + ... + 10939052.

It is an arithmetic number, because the mean of its divisors is an integer number (3237342648540).

Almost surely, 2^{26894811685617} is an apocalyptic number.

It is an amenable number.

26894811685617 is a deficient number, since it is larger than the sum of its proper divisors (11953300096863).

26894811685617 is a wasteful number, since it uses less digits than its factorization.

26894811685617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3881452 (or 3881449 counting only the distinct ones).

The product of its digits is 278691840, while the sum is 72.

The spelling of 26894811685617 in words is "twenty-six trillion, eight hundred ninety-four billion, eight hundred eleven million, six hundred eighty-five thousand, six hundred seventeen".