26205757979 has 2 divisors, whose sum is σ = 26205757980. Its totient is φ = 26205757978.

The previous prime is 26205757957. The next prime is 26205758003. The reversal of 26205757979 is 97975750262.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-26205757979 is a prime.

It is not a weakly prime, because it can be changed into another prime (26205754979) 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, 13102878989 + 13102878990.

It is an arithmetic number, because the mean of its divisors is an integer number (13102878990).

Almost surely, 2^26205757979 is an apocalyptic number.

26205757979 is a deficient number, since it is larger than the sum of its proper divisors (1).

26205757979 is an equidigital number, since it uses as much as digits as its factorization.

26205757979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16669800, while the sum is 59.

The spelling of 26205757979 in words is "twenty-six billion, two hundred five million, seven hundred fifty-seven thousand, nine hundred seventy-nine".