25471824134856 has 128 divisors (see below), whose sum is σ = 73565294031360. Its totient is φ = 7263674700800.

The previous prime is 25471824134851. The next prime is 25471824134921. The reversal of 25471824134856 is 65843142817452.

It is a super-2 number, since 2×25471824134856² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25471824134856.

It is not an unprimeable number, because it can be changed into a prime (25471824134851) 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, 31969435 + ... + 32756501.

It is an arithmetic number, because the mean of its divisors is an integer number (574728859620).

Almost surely, 2^{25471824134856} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25471824134856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36782647015680).

25471824134856 is an abundant number, since it is smaller than the sum of its proper divisors (48093469896504).

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

25471824134856 is a wasteful number, since it uses less digits than its factorization.

25471824134856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794315 (or 794311 counting only the distinct ones).

The product of its digits is 51609600, while the sum is 60.

The spelling of 25471824134856 in words is "twenty-five trillion, four hundred seventy-one billion, eight hundred twenty-four million, one hundred thirty-four thousand, eight hundred fifty-six".