26730680489 has 2 divisors, whose sum is σ = 26730680490. Its totient is φ = 26730680488.

The previous prime is 26730680443. The next prime is 26730680531. The reversal of 26730680489 is 98408603762.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16309333264 + 10421347225 = 127708^2 + 102085^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26730680489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 26730680489.

It is not a weakly prime, because it can be changed into another prime (26730680419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13365340244 + 13365340245.

It is an arithmetic number, because the mean of its divisors is an integer number (13365340245).

Almost surely, 2^26730680489 is an apocalyptic number.

It is an amenable number.

26730680489 is a deficient number, since it is larger than the sum of its proper divisors (1).

26730680489 is an equidigital number, since it uses as much as digits as its factorization.

26730680489 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3483648, while the sum is 53.

The spelling of 26730680489 in words is "twenty-six billion, seven hundred thirty million, six hundred eighty thousand, four hundred eighty-nine".