25603331240 has 16 divisors (see below), whose sum is σ = 57607495380. Its totient is φ = 10241332480.

The previous prime is 25603331209. The next prime is 25603331261. The reversal of 25603331240 is 4213330652.

It can be written as a sum of positive squares in 2 ways, for example, as 25503451204 + 99880036 = 159698^2 + 9994^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320041601 + ... + 320041680.

Almost surely, 2^25603331240 is an apocalyptic number.

25603331240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25603331240 is an abundant number, since it is smaller than the sum of its proper divisors (32004164140).

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

25603331240 is a wasteful number, since it uses less digits than its factorization.

25603331240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640083292 (or 640083288 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 25603331240 its reverse (4213330652), we get a palindrome (29816661892).

The spelling of 25603331240 in words is "twenty-five billion, six hundred three million, three hundred thirty-one thousand, two hundred forty".