26191397826 has 48 divisors (see below), whose sum is σ = 62221281408. Its totient is φ = 7896487200.

The previous prime is 26191397741. The next prime is 26191397851. The reversal of 26191397826 is 62879319162.

26191397826 is a `hidden beast` number, since 2 + 619 + 13 + 9 + 7 + 8 + 2 + 6 = 666.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 296730 + ... + 374741.

It is an arithmetic number, because the mean of its divisors is an integer number (1296276696).

Almost surely, 2^26191397826 is an apocalyptic number.

26191397826 is an abundant number, since it is smaller than the sum of its proper divisors (36029883582).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26191397826 is a wasteful number, since it uses less digits than its factorization.

26191397826 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 671687 (or 671684 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The spelling of 26191397826 in words is "twenty-six billion, one hundred ninety-one million, three hundred ninety-seven thousand, eight hundred twenty-six".