25012002500 has 30 divisors (see below), whose sum is σ = 54696252534. Its totient is φ = 10004800000.

The previous prime is 25012002493. The next prime is 25012002529. The reversal of 25012002500 is 520021052.

It can be written as a sum of positive squares in 5 ways, for example, as 11001492544 + 14010509956 = 104888^2 + 118366^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4999901 + ... + 5004900.

Almost surely, 2^25012002500 is an apocalyptic number.

25012002500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25012002500 is an abundant number, since it is smaller than the sum of its proper divisors (29684250034).

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

25012002500 is a wasteful number, since it uses less digits than its factorization.

25012002500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10004825 (or 10004808 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 17.

Adding to 25012002500 its reverse (520021052), we get a palindrome (25532023552).

The spelling of 25012002500 in words is "twenty-five billion, twelve million, two thousand, five hundred".