26180240689 has 2 divisors, whose sum is σ = 26180240690. Its totient is φ = 26180240688.

The previous prime is 26180240641. The next prime is 26180240707. The reversal of 26180240689 is 98604208162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17713480464 + 8466760225 = 133092^2 + 92015^2 .

It is a cyclic number.

It is not a de Polignac number, because 26180240689 - 2⁷ = 26180240561 is a prime.

It is not a weakly prime, because it can be changed into another prime (26180244689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13090120344 + 13090120345.

It is an arithmetic number, because the mean of its divisors is an integer number (13090120345).

Almost surely, 2^26180240689 is an apocalyptic number.

It is an amenable number.

26180240689 is a deficient number, since it is larger than the sum of its proper divisors (1).

26180240689 is an equidigital number, since it uses as much as digits as its factorization.

26180240689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 331776, while the sum is 46.

The spelling of 26180240689 in words is "twenty-six billion, one hundred eighty million, two hundred forty thousand, six hundred eighty-nine".