25603129472 has 24 divisors (see below), whose sum is σ = 51009841215. Its totient is φ = 12800659584.

The previous prime is 25603129469. The next prime is 25603129477. The reversal of 25603129472 is 27492130652.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 12801564736 + 12801564736 = 113144^2 + 113144^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=113144.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25603129477) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1803233 + ... + 1817375.

Almost surely, 2^25603129472 is an apocalyptic number.

It is an amenable number.

25603129472 is a deficient number, since it is larger than the sum of its proper divisors (25406711743).

25603129472 is an frugal number, since it uses more digits than its factorization.

25603129472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28300 (or 14145 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 25603129472 in words is "twenty-five billion, six hundred three million, one hundred twenty-nine thousand, four hundred seventy-two".