26085186661 has 2 divisors, whose sum is σ = 26085186662. Its totient is φ = 26085186660.

The previous prime is 26085186653. The next prime is 26085186667. The reversal of 26085186661 is 16668158062.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20639632225 + 5445554436 = 143665^2 + 73794^2 .

It is a cyclic number.

It is not a de Polignac number, because 26085186661 - 2³ = 26085186653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26085186667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13042593330 + 13042593331.

It is an arithmetic number, because the mean of its divisors is an integer number (13042593331).

Almost surely, 2^26085186661 is an apocalyptic number.

It is an amenable number.

26085186661 is a deficient number, since it is larger than the sum of its proper divisors (1).

26085186661 is an equidigital number, since it uses as much as digits as its factorization.

26085186661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 829440, while the sum is 49.

The spelling of 26085186661 in words is "twenty-six billion, eighty-five million, one hundred eighty-six thousand, six hundred sixty-one".