25831239841 has 27 divisors (see below), whose sum is σ = 30005054163. Its totient is φ = 22218071040.

The previous prime is 25831239823. The next prime is 25831239851. The reversal of 25831239841 is 14893213852.

The square root of 25831239841 is 160721.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 10106079841 + 15725160000 = 100529^2 + 125400^2 .

It is not a de Polignac number, because 25831239841 - 2¹³ = 25831231649 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25831239791 and 25831239800.

It is not an unprimeable number, because it can be changed into a prime (25831239851) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33590305 + ... + 33591073.

Almost surely, 2^25831239841 is an apocalyptic number.

25831239841 is the 160721-st square number.

25831239841 is the 80361-st centered octagonal number.

It is an amenable number.

25831239841 is a deficient number, since it is larger than the sum of its proper divisors (4173814322).

25831239841 is an frugal number, since it uses more digits than its factorization.

25831239841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598 (or 799 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The spelling of 25831239841 in words is "twenty-five billion, eight hundred thirty-one million, two hundred thirty-nine thousand, eight hundred forty-one".