25123452205 has 4 divisors (see below), whose sum is σ = 30148142652. Its totient is φ = 20098761760.

The previous prime is 25123452197. The next prime is 25123452217. The reversal of 25123452205 is 50225432152.

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 5078272644 + 20045179561 = 71262^2 + 141581^2 .

It is not a de Polignac number, because 25123452205 - 2³ = 25123452197 is a prime.

It is a Duffinian number.

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, 2512345216 + ... + 2512345225.

It is an arithmetic number, because the mean of its divisors is an integer number (7537035663).

Almost surely, 2^25123452205 is an apocalyptic number.

It is an amenable number.

25123452205 is a deficient number, since it is larger than the sum of its proper divisors (5024690447).

25123452205 is an equidigital number, since it uses as much as digits as its factorization.

25123452205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5024690446.

The product of its (nonzero) digits is 24000, while the sum is 31.

Adding to 25123452205 its reverse (50225432152), we get a palindrome (75348884357).

The spelling of 25123452205 in words is "twenty-five billion, one hundred twenty-three million, four hundred fifty-two thousand, two hundred five".