25759593802861 has 2 divisors, whose sum is σ = 25759593802862. Its totient is φ = 25759593802860.

The previous prime is 25759593802847. The next prime is 25759593802973. The reversal of 25759593802861 is 16820839595752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19706665329961 + 6052928472900 = 4439219^2 + 2460270^2 .

It is a cyclic number.

It is not a de Polignac number, because 25759593802861 - 2¹¹ = 25759593800813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25759593802561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12879796901430 + 12879796901431.

It is an arithmetic number, because the mean of its divisors is an integer number (12879796901431).

Almost surely, 2^{25759593802861} is an apocalyptic number.

It is an amenable number.

25759593802861 is a deficient number, since it is larger than the sum of its proper divisors (1).

25759593802861 is an equidigital number, since it uses as much as digits as its factorization.

25759593802861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 326592000, while the sum is 70.

The spelling of 25759593802861 in words is "twenty-five trillion, seven hundred fifty-nine billion, five hundred ninety-three million, eight hundred two thousand, eight hundred sixty-one".