26381582457077 has 2 divisors, whose sum is σ = 26381582457078. Its totient is φ = 26381582457076.

The previous prime is 26381582456963. The next prime is 26381582457107. The reversal of 26381582457077 is 77075428518362.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15732122707876 + 10649459749201 = 3966374^2 + 3263351^2 .

It is a cyclic number.

It is not a de Polignac number, because 26381582457077 - 2⁴⁴ = 8789396412661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26381582427077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13190791228538 + 13190791228539.

It is an arithmetic number, because the mean of its divisors is an integer number (13190791228539).

Almost surely, 2^{26381582457077} is an apocalyptic number.

It is an amenable number.

26381582457077 is a deficient number, since it is larger than the sum of its proper divisors (1).

26381582457077 is an equidigital number, since it uses as much as digits as its factorization.

26381582457077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 158054400, while the sum is 65.

The spelling of 26381582457077 in words is "twenty-six trillion, three hundred eighty-one billion, five hundred eighty-two million, four hundred fifty-seven thousand, seventy-seven".