25471271982 has 64 divisors (see below), whose sum is σ = 55671739200. Its totient is φ = 7721754624.

The previous prime is 25471271981. The next prime is 25471271999. The reversal of 25471271982 is 28917217452.

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 polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7383394 + ... + 7386842.

It is an arithmetic number, because the mean of its divisors is an integer number (869870925).

Almost surely, 2^25471271982 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25471271982, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27835869600).

25471271982 is an abundant number, since it is smaller than the sum of its proper divisors (30200467218).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25471271982 is a wasteful number, since it uses less digits than its factorization.

25471271982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4837.

The product of its digits is 564480, while the sum is 48.

The spelling of 25471271982 in words is "twenty-five billion, four hundred seventy-one million, two hundred seventy-one thousand, nine hundred eighty-two".