26885194087 has 2 divisors, whose sum is σ = 26885194088. Its totient is φ = 26885194086.

The previous prime is 26885194069. The next prime is 26885194099. The reversal of 26885194087 is 78049158862.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26885194087 is a prime.

It is a super-2 number, since 2×26885194087² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26885194487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13442597043 + 13442597044.

It is an arithmetic number, because the mean of its divisors is an integer number (13442597044).

Almost surely, 2^26885194087 is an apocalyptic number.

26885194087 is a deficient number, since it is larger than the sum of its proper divisors (1).

26885194087 is an equidigital number, since it uses as much as digits as its factorization.

26885194087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7741440, while the sum is 58.

The spelling of 26885194087 in words is "twenty-six billion, eight hundred eighty-five million, one hundred ninety-four thousand, eighty-seven".