25612321895 has 4 divisors (see below), whose sum is σ = 30734786280. Its totient is φ = 20489857512.

The previous prime is 25612321829. The next prime is 25612321913. The reversal of 25612321895 is 59812321652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25612321895 - 2¹⁸ = 25612059751 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 (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2561232185 + ... + 2561232194.

It is an arithmetic number, because the mean of its divisors is an integer number (7683696570).

Almost surely, 2^25612321895 is an apocalyptic number.

25612321895 is a deficient number, since it is larger than the sum of its proper divisors (5122464385).

25612321895 is an equidigital number, since it uses as much as digits as its factorization.

25612321895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5122464384.

The product of its digits is 259200, while the sum is 44.

The spelling of 25612321895 in words is "twenty-five billion, six hundred twelve million, three hundred twenty-one thousand, eight hundred ninety-five".