25505005002500 has 30 divisors (see below), whose sum is σ = 55774344944934. Its totient is φ = 10202002000000.

The previous prime is 25505005002427. The next prime is 25505005002511. The reversal of 25505005002500 is 520050050552.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 2137584354304 + 23367420648196 = 1462048^2 + 4833986^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 5100998501 + ... + 5101003500.

Almost surely, 2^{25505005002500} is an apocalyptic number.

25505005002500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25505005002500 is an abundant number, since it is smaller than the sum of its proper divisors (30269339942434).

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

25505005002500 is a wasteful number, since it uses less digits than its factorization.

25505005002500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10202002025 (or 10202002008 counting only the distinct ones).

The product of its (nonzero) digits is 12500, while the sum is 29.

The spelling of 25505005002500 in words is "twenty-five trillion, five hundred five billion, five million, two thousand, five hundred".