26684521489 has 2 divisors, whose sum is σ = 26684521490. Its totient is φ = 26684521488.

The previous prime is 26684521459. The next prime is 26684521537. The reversal of 26684521489 is 98412548662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15367817089 + 11316704400 = 123967^2 + 106380^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26684521489 is a prime.

It is not a weakly prime, because it can be changed into another prime (26684521439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13342260744 + 13342260745.

It is an arithmetic number, because the mean of its divisors is an integer number (13342260745).

Almost surely, 2^26684521489 is an apocalyptic number.

It is an amenable number.

26684521489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26684521489 is an equidigital number, since it uses as much as digits as its factorization.

26684521489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6635520, while the sum is 55.

The spelling of 26684521489 in words is "twenty-six billion, six hundred eighty-four million, five hundred twenty-one thousand, four hundred eighty-nine".