26186194961 has 2 divisors, whose sum is σ = 26186194962. Its totient is φ = 26186194960.

The previous prime is 26186194907. The next prime is 26186195041. The reversal of 26186194961 is 16949168162.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16859464336 + 9326730625 = 129844^2 + 96575^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26186194961 is a prime.

It is not a weakly prime, because it can be changed into another prime (26186194561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13093097480 + 13093097481.

It is an arithmetic number, because the mean of its divisors is an integer number (13093097481).

Almost surely, 2^26186194961 is an apocalyptic number.

It is an amenable number.

26186194961 is a deficient number, since it is larger than the sum of its proper divisors (1).

26186194961 is an equidigital number, since it uses as much as digits as its factorization.

26186194961 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 53.

The spelling of 26186194961 in words is "twenty-six billion, one hundred eighty-six million, one hundred ninety-four thousand, nine hundred sixty-one".