25644067548 has 96 divisors (see below), whose sum is σ = 65681763840. Its totient is φ = 7722762240.

The previous prime is 25644067541. The next prime is 25644067549. The reversal of 25644067548 is 84576044652.

It is a self number, because there is not a number n which added to its sum of digits gives 25644067548.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25644067541) 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, 26087065 + ... + 26088047.

It is an arithmetic number, because the mean of its divisors is an integer number (684185040).

Almost surely, 2^25644067548 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 25644067548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32840881920).

25644067548 is an abundant number, since it is smaller than the sum of its proper divisors (40037696292).

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

25644067548 is a wasteful number, since it uses less digits than its factorization.

25644067548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027 (or 2025 counting only the distinct ones).

The product of its (nonzero) digits is 6451200, while the sum is 51.

The spelling of 25644067548 in words is "twenty-five billion, six hundred forty-four million, sixty-seven thousand, five hundred forty-eight".