26677516861 has 2 divisors, whose sum is σ = 26677516862. Its totient is φ = 26677516860.

The previous prime is 26677516841. The next prime is 26677516919. The reversal of 26677516861 is 16861577662.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20716132761 + 5961384100 = 143931^2 + 77210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26677516861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26677516841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13338758430 + 13338758431.

It is an arithmetic number, because the mean of its divisors is an integer number (13338758431).

Almost surely, 2^26677516861 is an apocalyptic number.

It is an amenable number.

26677516861 is a deficient number, since it is larger than the sum of its proper divisors (1).

26677516861 is an equidigital number, since it uses as much as digits as its factorization.

26677516861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The spelling of 26677516861 in words is "twenty-six billion, six hundred seventy-seven million, five hundred sixteen thousand, eight hundred sixty-one".