25004550505 has 16 divisors (see below), whose sum is σ = 32744289600. Its totient is φ = 18178983360.

The previous prime is 25004550503. The next prime is 25004550517. The reversal of 25004550505 is 50505540052.

It is not a de Polignac number, because 25004550505 - 2¹ = 25004550503 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25004550503) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 90751 + ... + 241339.

It is an arithmetic number, because the mean of its divisors is an integer number (2046518100).

Almost surely, 2^25004550505 is an apocalyptic number.

It is an amenable number.

25004550505 is a deficient number, since it is larger than the sum of its proper divisors (7739739095).

25004550505 is a wasteful number, since it uses less digits than its factorization.

25004550505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153624.

The product of its (nonzero) digits is 25000, while the sum is 31.

The spelling of 25004550505 in words is "twenty-five billion, four million, five hundred fifty thousand, five hundred five".