25403321245 has 4 divisors (see below), whose sum is σ = 30483985500. Its totient is φ = 20322656992.

The previous prime is 25403321239. The next prime is 25403321249. The reversal of 25403321245 is 54212330452.

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 6394081369 + 19009239876 = 79963^2 + 137874^2 .

It is a cyclic number.

It is not a de Polignac number, because 25403321245 - 2¹³ = 25403313053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25403321249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2540332120 + ... + 2540332129.

It is an arithmetic number, because the mean of its divisors is an integer number (7620996375).

Almost surely, 2^25403321245 is an apocalyptic number.

It is an amenable number.

25403321245 is a deficient number, since it is larger than the sum of its proper divisors (5080664255).

25403321245 is an equidigital number, since it uses as much as digits as its factorization.

25403321245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5080664254.

The product of its (nonzero) digits is 28800, while the sum is 31.

Adding to 25403321245 its reverse (54212330452), we get a palindrome (79615651697).

The spelling of 25403321245 in words is "twenty-five billion, four hundred three million, three hundred twenty-one thousand, two hundred forty-five".