25713224769681 has 6 divisors (see below), whose sum is σ = 37141324667330. Its totient is φ = 17142149846448.

The previous prime is 25713224769601. The next prime is 25713224769733. The reversal of 25713224769681 is 18696742231752.

It is a happy number.

25713224769681 is a `hidden beast` number, since 2 + 5 + 71 + 3 + 2 + 2 + 476 + 96 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14470347528081 + 11242877241600 = 3803991^2 + 3353040^2 .

It is not a de Polignac number, because 25713224769681 - 2¹⁷ = 25713224638609 is a prime.

It is a super-2 number, since 2×25713224769681² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25713224769601) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1428512487196 + ... + 1428512487213.

Almost surely, 2^{25713224769681} is an apocalyptic number.

It is an amenable number.

25713224769681 is a deficient number, since it is larger than the sum of its proper divisors (11428099897649).

25713224769681 is a wasteful number, since it uses less digits than its factorization.

25713224769681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2857024974415 (or 2857024974412 counting only the distinct ones).

The product of its digits is 60963840, while the sum is 63.

The spelling of 25713224769681 in words is "twenty-five trillion, seven hundred thirteen billion, two hundred twenty-four million, seven hundred sixty-nine thousand, six hundred eighty-one".