25445335344 has 640 divisors, whose sum is σ = 89994240000. Its totient is φ = 6058229760.

The previous prime is 25445335343. The next prime is 25445335397. The reversal of 25445335344 is 44353354452.

It is a junction number, because it is equal to n+sod(n) for n = 25445335296 and 25445335305.

It is not an unprimeable number, because it can be changed into a prime (25445335343) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 50992407 + ... + 50992905.

It is an arithmetic number, because the mean of its divisors is an integer number (140616000).

Almost surely, 2^25445335344 is an apocalyptic number.

25445335344 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25445335344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44997120000).

25445335344 is an abundant number, since it is smaller than the sum of its proper divisors (64548904656).

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

25445335344 is a wasteful number, since it uses less digits than its factorization.

25445335344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593 (or 587 counting only the distinct ones).

The product of its digits is 1728000, while the sum is 42.

Adding to 25445335344 its reverse (44353354452), we get a palindrome (69798689796).

The spelling of 25445335344 in words is "twenty-five billion, four hundred forty-five million, three hundred thirty-five thousand, three hundred forty-four".