25171268651 has 4 divisors (see below), whose sum is σ = 25474537032. Its totient is φ = 24868000272.

The previous prime is 25171268597. The next prime is 25171268669. The reversal of 25171268651 is 15686217152.

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 25171268651 - 2¹⁸ = 25171006507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25171268351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 151634066 + ... + 151634231.

It is an arithmetic number, because the mean of its divisors is an integer number (6368634258).

Almost surely, 2^25171268651 is an apocalyptic number.

25171268651 is a deficient number, since it is larger than the sum of its proper divisors (303268381).

25171268651 is an equidigital number, since it uses as much as digits as its factorization.

25171268651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303268380.

The product of its digits is 201600, while the sum is 44.

The spelling of 25171268651 in words is "twenty-five billion, one hundred seventy-one million, two hundred sixty-eight thousand, six hundred fifty-one".