25875542171 has 4 divisors (see below), whose sum is σ = 25876351200. Its totient is φ = 25874733144.

The previous prime is 25875542153. The next prime is 25875542177. The reversal of 25875542171 is 17124557852.

It is a happy number.

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 25875542171 - 2¹⁰ = 25875541147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25875542177) 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, 354476 + ... + 421193.

It is an arithmetic number, because the mean of its divisors is an integer number (6469087800).

Almost surely, 2^25875542171 is an apocalyptic number.

25875542171 is a deficient number, since it is larger than the sum of its proper divisors (809029).

25875542171 is an equidigital number, since it uses as much as digits as its factorization.

25875542171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809028.

The product of its digits is 784000, while the sum is 47.

The spelling of 25875542171 in words is "twenty-five billion, eight hundred seventy-five million, five hundred forty-two thousand, one hundred seventy-one".