25643384832 has 272 divisors, whose sum is σ = 75161354240. Its totient is φ = 7729053696.

The previous prime is 25643384813. The next prime is 25643384839. The reversal of 25643384832 is 23848334652.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25643384839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201916353 + ... + 201916479.

Almost surely, 2^25643384832 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 25643384832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37580677120).

25643384832 is an abundant number, since it is smaller than the sum of its proper divisors (49517969408).

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

25643384832 is an equidigital number, since it uses as much as digits as its factorization.

25643384832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 254 (or 224 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 48.

The spelling of 25643384832 in words is "twenty-five billion, six hundred forty-three million, three hundred eighty-four thousand, eight hundred thirty-two".