26396593621 has 2 divisors, whose sum is σ = 26396593622. Its totient is φ = 26396593620.

The previous prime is 26396593591. The next prime is 26396593673. The reversal of 26396593621 is 12639569362.

It is an a-pointer prime, because the next prime (26396593673) can be obtained adding 26396593621 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19033237521 + 7363356100 = 137961^2 + 85810^2 .

It is a cyclic number.

It is not a de Polignac number, because 26396593621 - 2⁷ = 26396593493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26396590621) 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, 13198296810 + 13198296811.

It is an arithmetic number, because the mean of its divisors is an integer number (13198296811).

Almost surely, 2^26396593621 is an apocalyptic number.

It is an amenable number.

26396593621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26396593621 is an equidigital number, since it uses as much as digits as its factorization.

26396593621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3149280, while the sum is 52.

The spelling of 26396593621 in words is "twenty-six billion, three hundred ninety-six million, five hundred ninety-three thousand, six hundred twenty-one".