26021438593 has 2 divisors, whose sum is σ = 26021438594. Its totient is φ = 26021438592.

The previous prime is 26021438591. The next prime is 26021438609. The reversal of 26021438593 is 39583412062.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20859447184 + 5161991409 = 144428^2 + 71847^2 .

It is a cyclic number.

It is not a de Polignac number, because 26021438593 - 2¹ = 26021438591 is a prime.

Together with 26021438591, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (26021438591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13010719296 + 13010719297.

It is an arithmetic number, because the mean of its divisors is an integer number (13010719297).

Almost surely, 2^26021438593 is an apocalyptic number.

It is an amenable number.

26021438593 is a deficient number, since it is larger than the sum of its proper divisors (1).

26021438593 is an equidigital number, since it uses as much as digits as its factorization.

26021438593 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 43.

The spelling of 26021438593 in words is "twenty-six billion, twenty-one million, four hundred thirty-eight thousand, five hundred ninety-three".