25964585497 has 2 divisors, whose sum is σ = 25964585498. Its totient is φ = 25964585496.

The previous prime is 25964585459. The next prime is 25964585501. The reversal of 25964585497 is 79458546952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25233640201 + 730945296 = 158851^2 + 27036^2 .

It is a cyclic number.

It is not a de Polignac number, because 25964585497 - 2¹⁹ = 25964061209 is a prime.

It is not a weakly prime, because it can be changed into another prime (25964585407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12982292748 + 12982292749.

It is an arithmetic number, because the mean of its divisors is an integer number (12982292749).

Almost surely, 2^25964585497 is an apocalyptic number.

It is an amenable number.

25964585497 is a deficient number, since it is larger than the sum of its proper divisors (1).

25964585497 is an equidigital number, since it uses as much as digits as its factorization.

25964585497 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864000, while the sum is 64.

The spelling of 25964585497 in words is "twenty-five billion, nine hundred sixty-four million, five hundred eighty-five thousand, four hundred ninety-seven".