25309328448 has 112 divisors (see below), whose sum is σ = 69022610240. Its totient is φ = 8178776064.

The previous prime is 25309328437. The next prime is 25309328491. The reversal of 25309328448 is 84482390352.

It is a super-3 number, since 3×25309328448³ (a number of 32 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 25309328397 and 25309328406.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2004138 + ... + 2016726.

Almost surely, 2^25309328448 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 25309328448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34511305120).

25309328448 is an abundant number, since it is smaller than the sum of its proper divisors (43713281792).

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

25309328448 is a wasteful number, since it uses less digits than its factorization.

25309328448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12924 (or 12914 counting only the distinct ones).

The product of its (nonzero) digits is 1658880, while the sum is 48.

The spelling of 25309328448 in words is "twenty-five billion, three hundred nine million, three hundred twenty-eight thousand, four hundred forty-eight".