25015302500 has 30 divisors (see below), whose sum is σ = 54703468974. Its totient is φ = 10006120000.

The previous prime is 25015302493. The next prime is 25015302539. The reversal of 25015302500 is 520351052.

It can be written as a sum of positive squares in 5 ways, for example, as 8583651904 + 16431650596 = 92648^2 + 128186^2 .

It is an unprimeable number.

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 9 ways as a sum of consecutive naturals, for example, 5000561 + ... + 5005560.

Almost surely, 2^25015302500 is an apocalyptic number.

25015302500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25015302500 is an abundant number, since it is smaller than the sum of its proper divisors (29688166474).

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

25015302500 is a wasteful number, since it uses less digits than its factorization.

25015302500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006145 (or 10006128 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 23.

Adding to 25015302500 its reverse (520351052), we get a palindrome (25535653552).

The spelling of 25015302500 in words is "twenty-five billion, fifteen million, three hundred two thousand, five hundred".