26426390191 has 2 divisors, whose sum is σ = 26426390192. Its totient is φ = 26426390190.

The previous prime is 26426390131. The next prime is 26426390233. The reversal of 26426390191 is 19109362462.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26426390191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26426390131) 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 as a sum of consecutive naturals, namely, 13213195095 + 13213195096.

It is an arithmetic number, because the mean of its divisors is an integer number (13213195096).

Almost surely, 2^26426390191 is an apocalyptic number.

26426390191 is a deficient number, since it is larger than the sum of its proper divisors (1).

26426390191 is an equidigital number, since it uses as much as digits as its factorization.

26426390191 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 139968, while the sum is 43.

The spelling of 26426390191 in words is "twenty-six billion, four hundred twenty-six million, three hundred ninety thousand, one hundred ninety-one".