25109264251 has 4 divisors (see below), whose sum is σ = 25142260104. Its totient is φ = 25076268400.

The previous prime is 25109264227. The next prime is 25109264261. The reversal of 25109264251 is 15246290152.

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 25109264251 - 2¹³ = 25109256059 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 25109264251.

It is not an unprimeable number, because it can be changed into a prime (25109264261) 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, 16496785 + ... + 16498306.

It is an arithmetic number, because the mean of its divisors is an integer number (6285565026).

Almost surely, 2^25109264251 is an apocalyptic number.

25109264251 is a deficient number, since it is larger than the sum of its proper divisors (32995853).

25109264251 is an equidigital number, since it uses as much as digits as its factorization.

25109264251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32995852.

The product of its (nonzero) digits is 43200, while the sum is 37.

The spelling of 25109264251 in words is "twenty-five billion, one hundred nine million, two hundred sixty-four thousand, two hundred fifty-one".