26721388321087 has 2 divisors, whose sum is σ = 26721388321088. Its totient is φ = 26721388321086.

The previous prime is 26721388321079. The next prime is 26721388321163. The reversal of 26721388321087 is 78012388312762.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 26721388321087 - 2³ = 26721388321079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26721388321687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13360694160543 + 13360694160544.

It is an arithmetic number, because the mean of its divisors is an integer number (13360694160544).

Almost surely, 2^{26721388321087} is an apocalyptic number.

26721388321087 is a deficient number, since it is larger than the sum of its proper divisors (1).

26721388321087 is an equidigital number, since it uses as much as digits as its factorization.

26721388321087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10838016, while the sum is 58.

The spelling of 26721388321087 in words is "twenty-six trillion, seven hundred twenty-one billion, three hundred eighty-eight million, three hundred twenty-one thousand, eighty-seven".