26191836871 has 16 divisors (see below), whose sum is σ = 27211024800. Its totient is φ = 25190258688.

The previous prime is 26191836863. The next prime is 26191836877. The reversal of 26191836871 is 17863819162.

It is a cyclic number.

It is not a de Polignac number, because 26191836871 - 2³ = 26191836863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26191836877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1576335 + ... + 1592863.

It is an arithmetic number, because the mean of its divisors is an integer number (1700689050).

Almost surely, 2^26191836871 is an apocalyptic number.

26191836871 is a deficient number, since it is larger than the sum of its proper divisors (1019187929).

26191836871 is a wasteful number, since it uses less digits than its factorization.

26191836871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17058.

The product of its digits is 870912, while the sum is 52.

The spelling of 26191836871 in words is "twenty-six billion, one hundred ninety-one million, eight hundred thirty-six thousand, eight hundred seventy-one".