26361537749 has 2 divisors, whose sum is σ = 26361537750. Its totient is φ = 26361537748.

The previous prime is 26361537733. The next prime is 26361537773. The reversal of 26361537749 is 94773516362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21062716900 + 5298820849 = 145130^2 + 72793^2 .

It is a cyclic number.

It is not a de Polignac number, because 26361537749 - 2⁴ = 26361537733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 26361537749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26361537649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13180768874 + 13180768875.

It is an arithmetic number, because the mean of its divisors is an integer number (13180768875).

Almost surely, 2^26361537749 is an apocalyptic number.

It is an amenable number.

26361537749 is a deficient number, since it is larger than the sum of its proper divisors (1).

26361537749 is an equidigital number, since it uses as much as digits as its factorization.

26361537749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5715360, while the sum is 53.

The spelling of 26361537749 in words is "twenty-six billion, three hundred sixty-one million, five hundred thirty-seven thousand, seven hundred forty-nine".