26091939787 has 4 divisors (see below), whose sum is σ = 26933615296. Its totient is φ = 25250264280.

The previous prime is 26091939781. The next prime is 26091939793. The reversal of 26091939787 is 78793919062.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78793919062 = 2 ⋅39396959531.

It is an interprime number because it is at equal distance from previous prime (26091939781) and next prime (26091939793).

It is a cyclic number.

It is not a de Polignac number, because 26091939787 - 2¹⁵ = 26091907019 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26091939781) 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 3 ways as a sum of consecutive naturals, for example, 420837708 + ... + 420837769.

It is an arithmetic number, because the mean of its divisors is an integer number (6733403824).

Almost surely, 2^26091939787 is an apocalyptic number.

26091939787 is a deficient number, since it is larger than the sum of its proper divisors (841675509).

26091939787 is an equidigital number, since it uses as much as digits as its factorization.

26091939787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 841675508.

The product of its (nonzero) digits is 10287648, while the sum is 61.

The spelling of 26091939787 in words is "twenty-six billion, ninety-one million, nine hundred thirty-nine thousand, seven hundred eighty-seven".