25587245213 has 4 divisors (see below), whose sum is σ = 25589718048. Its totient is φ = 25584772380.

The previous prime is 25587245143. The next prime is 25587245227. The reversal of 25587245213 is 31254278552.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25587245213 - 2²⁰ = 25586196637 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 (25587245293) 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, 1220831 + ... + 1241612.

It is an arithmetic number, because the mean of its divisors is an integer number (6397429512).

Almost surely, 2^25587245213 is an apocalyptic number.

It is an amenable number.

25587245213 is a deficient number, since it is larger than the sum of its proper divisors (2472835).

25587245213 is a wasteful number, since it uses less digits than its factorization.

25587245213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2472834.

The product of its digits is 672000, while the sum is 44.

The spelling of 25587245213 in words is "twenty-five billion, five hundred eighty-seven million, two hundred forty-five thousand, two hundred thirteen".