26115191 has 2 divisors, whose sum is σ = 26115192. Its totient is φ = 26115190.

The previous prime is 26115161. The next prime is 26115209. The reversal of 26115191 is 19151162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26115191 - 2²² = 21920887 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26115191.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26115121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13057595 + 13057596.

It is an arithmetic number, because the mean of its divisors is an integer number (13057596).

Almost surely, 2^26115191 is an apocalyptic number.

26115191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26115191 is an equidigital number, since it uses as much as digits as its factorization.

26115191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 26.

The square root of 26115191 is about 5110.3024372340. The cubic root of 26115191 is about 296.6864660158.

The spelling of 26115191 in words is "twenty-six million, one hundred fifteen thousand, one hundred ninety-one".