25503520253 has 4 divisors (see below), whose sum is σ = 25514923260. Its totient is φ = 25492117248.

The previous prime is 25503520219. The next prime is 25503520271. The reversal of 25503520253 is 35202530552.

It is a happy number.

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 11673289849 + 13830230404 = 108043^2 + 117602^2 .

It is a cyclic number.

It is not a de Polignac number, because 25503520253 - 2²⁰ = 25502471677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25503520283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5698148 + ... + 5702621.

It is an arithmetic number, because the mean of its divisors is an integer number (6378730815).

Almost surely, 2^25503520253 is an apocalyptic number.

It is an amenable number.

25503520253 is a deficient number, since it is larger than the sum of its proper divisors (11403007).

25503520253 is a wasteful number, since it uses less digits than its factorization.

25503520253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11403006.

The product of its (nonzero) digits is 45000, while the sum is 32.

The spelling of 25503520253 in words is "twenty-five billion, five hundred three million, five hundred twenty thousand, two hundred fifty-three".