25448423616 has 672 divisors, whose sum is σ = 96319238400. Its totient is φ = 6514421760.

The previous prime is 25448423599. The next prime is 25448423617. The reversal of 25448423616 is 61632484452.

25448423616 is a `hidden beast` number, since 2 + 5 + 4 + 4 + 8 + 4 + 23 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is not an unprimeable number, because it can be changed into a prime (25448423617) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 82893735 + ... + 82894041.

It is an arithmetic number, because the mean of its divisors is an integer number (143332200).

Almost surely, 2^25448423616 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 25448423616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48159619200).

25448423616 is an abundant number, since it is smaller than the sum of its proper divisors (70870814784).

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

25448423616 is a wasteful number, since it uses less digits than its factorization.

25448423616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 442 (or 419 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 45.

The spelling of 25448423616 in words is "twenty-five billion, four hundred forty-eight million, four hundred twenty-three thousand, six hundred sixteen".