26191397827 has 6 divisors (see below), whose sum is σ = 30467544468. Its totient is φ = 22449769524.

The previous prime is 26191397741. The next prime is 26191397851. The reversal of 26191397827 is 72879319162.

It is a happy number.

It is not a de Polignac number, because 26191397827 - 2⁷ = 26191397699 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26191397927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 267259113 + ... + 267259210.

It is an arithmetic number, because the mean of its divisors is an integer number (5077924078).

Almost surely, 2^26191397827 is an apocalyptic number.

26191397827 is a deficient number, since it is larger than the sum of its proper divisors (4276146641).

26191397827 is an equidigital number, since it uses as much as digits as its factorization.

26191397827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534518337 (or 534518330 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 55.

The spelling of 26191397827 in words is "twenty-six billion, one hundred ninety-one million, three hundred ninety-seven thousand, eight hundred twenty-seven".