25349325281 has 6 divisors (see below), whose sum is σ = 29487990690. Its totient is φ = 21727993056.

The previous prime is 25349325257. The next prime is 25349325283. The reversal of 25349325281 is 18252394352.

It can be written as a sum of positive squares in only one way, i.e., 15635251681 + 9714073600 = 125041^2 + 98560^2 .

It is not a de Polignac number, because 25349325281 - 2³⁰ = 24275583457 is a prime.

It is a super-2 number, since 2×25349325281² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25349325283) 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, 258666536 + ... + 258666633.

It is an arithmetic number, because the mean of its divisors is an integer number (4914665115).

Almost surely, 2^25349325281 is an apocalyptic number.

It is an amenable number.

25349325281 is a deficient number, since it is larger than the sum of its proper divisors (4138665409).

25349325281 is an equidigital number, since it uses as much as digits as its factorization.

25349325281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517333183 (or 517333176 counting only the distinct ones).

The product of its digits is 518400, while the sum is 44.

The spelling of 25349325281 in words is "twenty-five billion, three hundred forty-nine million, three hundred twenty-five thousand, two hundred eighty-one".