25280500505 has 16 divisors (see below), whose sum is σ = 34591962384. Its totient is φ = 17570519040.

The previous prime is 25280500499. The next prime is 25280500523. The reversal of 25280500505 is 50500508252.

It can be written as a sum of positive squares in 8 ways, for example, as 874562329 + 24405938176 = 29573^2 + 156224^2 .

It is not a de Polignac number, because 25280500505 - 2⁴ = 25280500489 is a prime.

It is a Duffinian number.

It is a Curzon number.

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 15 ways as a sum of consecutive naturals, for example, 11438036 + ... + 11440245.

It is an arithmetic number, because the mean of its divisors is an integer number (2161997649).

Almost surely, 2^25280500505 is an apocalyptic number.

It is an amenable number.

25280500505 is a deficient number, since it is larger than the sum of its proper divisors (9311461879).

25280500505 is a wasteful number, since it uses less digits than its factorization.

25280500505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22878316.

The product of its (nonzero) digits is 20000, while the sum is 32.

The spelling of 25280500505 in words is "twenty-five billion, two hundred eighty million, five hundred thousand, five hundred five".