25440225320 has 32 divisors (see below), whose sum is σ = 57303698400. Its totient is φ = 10164856128.

The previous prime is 25440225277. The next prime is 25440225347. The reversal of 25440225320 is 2352204452.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 314330 + ... + 386889.

It is an arithmetic number, because the mean of its divisors is an integer number (1790740575).

Almost surely, 2^25440225320 is an apocalyptic number.

25440225320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25440225320 is an abundant number, since it is smaller than the sum of its proper divisors (31863473080).

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

25440225320 is a wasteful number, since it uses less digits than its factorization.

25440225320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702137 (or 702133 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

Adding to 25440225320 its reverse (2352204452), we get a palindrome (27792429772).

The spelling of 25440225320 in words is "twenty-five billion, four hundred forty million, two hundred twenty-five thousand, three hundred twenty".