25500471871 has 4 divisors (see below), whose sum is σ = 29143396432. Its totient is φ = 21857547312.

The previous prime is 25500471863. The next prime is 25500471907. The reversal of 25500471871 is 17817400552.

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 25500471871 - 2³ = 25500471863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25500471851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1821462270 + ... + 1821462283.

It is an arithmetic number, because the mean of its divisors is an integer number (7285849108).

Almost surely, 2^25500471871 is an apocalyptic number.

25500471871 is a deficient number, since it is larger than the sum of its proper divisors (3642924561).

25500471871 is an equidigital number, since it uses as much as digits as its factorization.

25500471871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3642924560.

The product of its (nonzero) digits is 78400, while the sum is 40.

The spelling of 25500471871 in words is "twenty-five billion, five hundred million, four hundred seventy-one thousand, eight hundred seventy-one".