25471271983 has 4 divisors (see below), whose sum is σ = 25491126168. Its totient is φ = 25451417800.

The previous prime is 25471271981. The next prime is 25471271999. The reversal of 25471271983 is 38917217452.

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 25471271983 - 2¹ = 25471271981 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25471271981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9925168 + ... + 9927733.

It is an arithmetic number, because the mean of its divisors is an integer number (6372781542).

Almost surely, 2^25471271983 is an apocalyptic number.

25471271983 is a deficient number, since it is larger than the sum of its proper divisors (19854185).

25471271983 is a wasteful number, since it uses less digits than its factorization.

25471271983 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19854184.

The product of its digits is 846720, while the sum is 49.

The spelling of 25471271983 in words is "twenty-five billion, four hundred seventy-one million, two hundred seventy-one thousand, nine hundred eighty-three".