26161115249 has 2 divisors, whose sum is σ = 26161115250. Its totient is φ = 26161115248.

The previous prime is 26161115237. The next prime is 26161115251. The reversal of 26161115249 is 94251116162.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22624672225 + 3536443024 = 150415^2 + 59468^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26161115249 is a prime.

Together with 26161115251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (26161117249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13080557624 + 13080557625.

It is an arithmetic number, because the mean of its divisors is an integer number (13080557625).

Almost surely, 2^26161115249 is an apocalyptic number.

It is an amenable number.

26161115249 is a deficient number, since it is larger than the sum of its proper divisors (1).

26161115249 is an equidigital number, since it uses as much as digits as its factorization.

26161115249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 38.

The spelling of 26161115249 in words is "twenty-six billion, one hundred sixty-one million, one hundred fifteen thousand, two hundred forty-nine".