25849886841 has 9 divisors (see below), whose sum is σ = 37339422159. Its totient is φ = 17232936336.

The previous prime is 25849886833. The next prime is 25849886849. The reversal of 25849886841 is 14868894852.

The square root of 25849886841 is 160779.

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

25849886841 is a `hidden beast` number, since 2 + 584 + 9 + 8 + 8 + 6 + 8 + 41 = 666.

It is an interprime number because it is at equal distance from previous prime (25849886833) and next prime (25849886849).

It can be written as a sum of positive squares in only one way, i.e., 11855943225 + 13993943616 = 108885^2 + 118296^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 25849886841 - 2³ = 25849886833 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25849886849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 455541 + ... + 509133.

Almost surely, 2^25849886841 is an apocalyptic number.

25849886841 is the 160779-th square number.

25849886841 is the 80390-th centered octagonal number.

It is an amenable number.

25849886841 is a deficient number, since it is larger than the sum of its proper divisors (11489535318).

25849886841 is an frugal number, since it uses more digits than its factorization.

25849886841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107192 (or 53596 counting only the distinct ones).

The product of its digits is 35389440, while the sum is 63.

The spelling of 25849886841 in words is "twenty-five billion, eight hundred forty-nine million, eight hundred eighty-six thousand, eight hundred forty-one".