25590440552681 has 2 divisors, whose sum is σ = 25590440552682. Its totient is φ = 25590440552680.

The previous prime is 25590440552647. The next prime is 25590440552701. The reversal of 25590440552681 is 18625504409552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13092384355600 + 12498056197081 = 3618340^2 + 3535259^2 .

It is a cyclic number.

It is not a de Polignac number, because 25590440552681 - 2¹⁰ = 25590440551657 is a prime.

It is a super-2 number, since 2×25590440552681² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25590340552681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12795220276340 + 12795220276341.

It is an arithmetic number, because the mean of its divisors is an integer number (12795220276341).

Almost surely, 2^{25590440552681} is an apocalyptic number.

It is an amenable number.

25590440552681 is a deficient number, since it is larger than the sum of its proper divisors (1).

25590440552681 is an equidigital number, since it uses as much as digits as its factorization.

25590440552681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280000, while the sum is 56.

The spelling of 25590440552681 in words is "twenty-five trillion, five hundred ninety billion, four hundred forty million, five hundred fifty-two thousand, six hundred eighty-one".