25328850866251 has 4 divisors (see below), whose sum is σ = 25375669445104. Its totient is φ = 25282032287400.

The previous prime is 25328850866227. The next prime is 25328850866261. The reversal of 25328850866251 is 15266805882352.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25328850866251 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25328850866251.

It is not an unprimeable number, because it can be changed into a prime (25328850866261) 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, 23409288615 + ... + 23409289696.

It is an arithmetic number, because the mean of its divisors is an integer number (6343917361276).

Almost surely, 2^{25328850866251} is an apocalyptic number.

25328850866251 is a deficient number, since it is larger than the sum of its proper divisors (46818578853).

25328850866251 is an equidigital number, since it uses as much as digits as its factorization.

25328850866251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46818578852.

The product of its (nonzero) digits is 55296000, while the sum is 61.

The spelling of 25328850866251 in words is "twenty-five trillion, three hundred twenty-eight billion, eight hundred fifty million, eight hundred sixty-six thousand, two hundred fifty-one".