25448280320 has 144 divisors (see below), whose sum is σ = 63111917568. Its totient is φ = 9823887360.

The previous prime is 25448280313. The next prime is 25448280323. The reversal of 25448280320 is 2308284452.

It is a super-2 number, since 2×25448280320² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25448280323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6012605 + ... + 6016835.

Almost surely, 2^25448280320 is an apocalyptic number.

25448280320 is a gapful number since it is divisible by the number (20) 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 25448280320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31555958784).

25448280320 is an abundant number, since it is smaller than the sum of its proper divisors (37663637248).

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

25448280320 is a wasteful number, since it uses less digits than its factorization.

25448280320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4416 (or 4402 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 38.

The spelling of 25448280320 in words is "twenty-five billion, four hundred forty-eight million, two hundred eighty thousand, three hundred twenty".