26812193805 has 48 divisors (see below), whose sum is σ = 50306996160. Its totient is φ = 13547189088.

The previous prime is 26812193777. The next prime is 26812193831. The reversal of 26812193805 is 50839121862.

26812193805 is a `hidden beast` number, since 268 + 1 + 2 + 1 + 9 + 380 + 5 = 666.

It is not a de Polignac number, because 26812193805 - 2¹² = 26812189709 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 226347 + ... + 323816.

It is an arithmetic number, because the mean of its divisors is an integer number (1048062420).

Almost surely, 2^26812193805 is an apocalyptic number.

It is an amenable number.

26812193805 is a deficient number, since it is larger than the sum of its proper divisors (23494802355).

26812193805 is a wasteful number, since it uses less digits than its factorization.

26812193805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550215 (or 550190 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 26812193805 in words is "twenty-six billion, eight hundred twelve million, one hundred ninety-three thousand, eight hundred five".