25293087605 has 4 divisors (see below), whose sum is σ = 30351705132. Its totient is φ = 20234470080.

The previous prime is 25293087569. The next prime is 25293087629. The reversal of 25293087605 is 50678039252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7197995281 + 18095092324 = 84841^2 + 134518^2 .

It is not a de Polignac number, because 25293087605 - 2⁸ = 25293087349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25293087605.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2529308756 + ... + 2529308765.

It is an arithmetic number, because the mean of its divisors is an integer number (7587926283).

Almost surely, 2^25293087605 is an apocalyptic number.

It is an amenable number.

25293087605 is a deficient number, since it is larger than the sum of its proper divisors (5058617527).

25293087605 is an equidigital number, since it uses as much as digits as its factorization.

25293087605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5058617526.

The product of its (nonzero) digits is 907200, while the sum is 47.

The spelling of 25293087605 in words is "twenty-five billion, two hundred ninety-three million, eighty-seven thousand, six hundred five".