25643872339 has 4 divisors (see below), whose sum is σ = 25709795280. Its totient is φ = 25577949400.

The previous prime is 25643872313. The next prime is 25643872351. The reversal of 25643872339 is 93327834652.

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 25643872339 - 2⁷ = 25643872211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25643872439) 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, 32960887 + ... + 32961664.

It is an arithmetic number, because the mean of its divisors is an integer number (6427448820).

Almost surely, 2^25643872339 is an apocalyptic number.

25643872339 is a deficient number, since it is larger than the sum of its proper divisors (65922941).

25643872339 is an equidigital number, since it uses as much as digits as its factorization.

25643872339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65922940.

The product of its digits is 6531840, while the sum is 52.

The spelling of 25643872339 in words is "twenty-five billion, six hundred forty-three million, eight hundred seventy-two thousand, three hundred thirty-nine".