26275138609 has 2 divisors, whose sum is σ = 26275138610. Its totient is φ = 26275138608.

The previous prime is 26275138507. The next prime is 26275138633. The reversal of 26275138609 is 90683157262.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15213989025 + 11061149584 = 123345^2 + 105172^2 .

It is a cyclic number.

It is not a de Polignac number, because 26275138609 - 2¹¹ = 26275136561 is a prime.

It is not a weakly prime, because it can be changed into another prime (26275138699) 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, 13137569304 + 13137569305.

It is an arithmetic number, because the mean of its divisors is an integer number (13137569305).

Almost surely, 2^26275138609 is an apocalyptic number.

It is an amenable number.

26275138609 is a deficient number, since it is larger than the sum of its proper divisors (1).

26275138609 is an equidigital number, since it uses as much as digits as its factorization.

26275138609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1088640, while the sum is 49.

The spelling of 26275138609 in words is "twenty-six billion, two hundred seventy-five million, one hundred thirty-eight thousand, six hundred nine".