25211553245 has 16 divisors (see below), whose sum is σ = 32944320000. Its totient is φ = 18448815168.

The previous prime is 25211553221. The next prime is 25211553287. The reversal of 25211553245 is 54235511252.

It is a happy number.

It is not a de Polignac number, because 25211553245 - 2¹⁰ = 25211552221 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4572845 + ... + 4578354.

It is an arithmetic number, because the mean of its divisors is an integer number (2059020000).

Almost surely, 2^25211553245 is an apocalyptic number.

It is an amenable number.

25211553245 is a deficient number, since it is larger than the sum of its proper divisors (7732766755).

25211553245 is a wasteful number, since it uses less digits than its factorization.

25211553245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9151252.

The product of its digits is 60000, while the sum is 35.

The spelling of 25211553245 in words is "twenty-five billion, two hundred eleven million, five hundred fifty-three thousand, two hundred forty-five".