26689874987 has 2 divisors, whose sum is σ = 26689874988. Its totient is φ = 26689874986.

The previous prime is 26689874977. The next prime is 26689875011. The reversal of 26689874987 is 78947898662.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26689874987 - 2⁶ = 26689874923 is a prime.

It is not a weakly prime, because it can be changed into another prime (26689874977) 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, 13344937493 + 13344937494.

It is an arithmetic number, because the mean of its divisors is an integer number (13344937494).

Almost surely, 2^26689874987 is an apocalyptic number.

26689874987 is a deficient number, since it is larger than the sum of its proper divisors (1).

26689874987 is an equidigital number, since it uses as much as digits as its factorization.

26689874987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 585252864, while the sum is 74.

The spelling of 26689874987 in words is "twenty-six billion, six hundred eighty-nine million, eight hundred seventy-four thousand, nine hundred eighty-seven".