26191809667 has 2 divisors, whose sum is σ = 26191809668. Its totient is φ = 26191809666.

The previous prime is 26191809653. The next prime is 26191809671. The reversal of 26191809667 is 76690819162.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 26191809667 - 2¹¹ = 26191807619 is a prime.

It is not a weakly prime, because it can be changed into another prime (26191809607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13095904833 + 13095904834.

It is an arithmetic number, because the mean of its divisors is an integer number (13095904834).

Almost surely, 2^26191809667 is an apocalyptic number.

26191809667 is a deficient number, since it is larger than the sum of its proper divisors (1).

26191809667 is an equidigital number, since it uses as much as digits as its factorization.

26191809667 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1959552, while the sum is 55.

The spelling of 26191809667 in words is "twenty-six billion, one hundred ninety-one million, eight hundred nine thousand, six hundred sixty-seven".