26684137589 has 2 divisors, whose sum is σ = 26684137590. Its totient is φ = 26684137588.

The previous prime is 26684137573. The next prime is 26684137661. The reversal of 26684137589 is 98573148662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15689566564 + 10994571025 = 125258^2 + 104855^2 .

It is a cyclic number.

It is not a de Polignac number, because 26684137589 - 2⁴ = 26684137573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26684137289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13342068794 + 13342068795.

It is an arithmetic number, because the mean of its divisors is an integer number (13342068795).

Almost surely, 2^26684137589 is an apocalyptic number.

It is an amenable number.

26684137589 is a deficient number, since it is larger than the sum of its proper divisors (1).

26684137589 is an equidigital number, since it uses as much as digits as its factorization.

26684137589 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17418240, while the sum is 59.

The spelling of 26684137589 in words is "twenty-six billion, six hundred eighty-four million, one hundred thirty-seven thousand, five hundred eighty-nine".