26243569739 has 2 divisors, whose sum is σ = 26243569740. Its totient is φ = 26243569738.

The previous prime is 26243569727. The next prime is 26243569763. The reversal of 26243569739 is 93796534262.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26243569739 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (26243569769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13121784869 + 13121784870.

It is an arithmetic number, because the mean of its divisors is an integer number (13121784870).

Almost surely, 2^26243569739 is an apocalyptic number.

26243569739 is a deficient number, since it is larger than the sum of its proper divisors (1).

26243569739 is an equidigital number, since it uses as much as digits as its factorization.

26243569739 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14696640, while the sum is 56.

The spelling of 26243569739 in words is "twenty-six billion, two hundred forty-three million, five hundred sixty-nine thousand, seven hundred thirty-nine".