26199891 has 12 divisors (see below), whose sum is σ = 37949080. Its totient is φ = 17418240.

The previous prime is 26199889. The next prime is 26199911. The reversal of 26199891 is 19899162.

It is not a de Polignac number, because 26199891 - 2¹ = 26199889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26199851) 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, 430 + ... + 7251.

Almost surely, 2^26199891 is an apocalyptic number.

26199891 is a deficient number, since it is larger than the sum of its proper divisors (11749189).

26199891 is a wasteful number, since it uses less digits than its factorization.

26199891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8066 (or 8063 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 26199891 is about 5118.5829093608. The cubic root of 26199891 is about 297.0068698884.

The spelling of 26199891 in words is "twenty-six million, one hundred ninety-nine thousand, eight hundred ninety-one".