25280505305 has 16 divisors (see below), whose sum is σ = 33560604288. Its totient is φ = 18126864000.

The previous prime is 25280505281. The next prime is 25280505317. The reversal of 25280505305 is 50350508252.

It is not a de Polignac number, because 25280505305 - 2⁶ = 25280505241 is a prime.

It is a super-2 number, since 2×25280505305² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3233036 + ... + 3240845.

It is an arithmetic number, because the mean of its divisors is an integer number (2097537768).

Almost surely, 2^25280505305 is an apocalyptic number.

It is an amenable number.

25280505305 is a deficient number, since it is larger than the sum of its proper divisors (8280098983).

25280505305 is a wasteful number, since it uses less digits than its factorization.

25280505305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6473968.

The product of its (nonzero) digits is 60000, while the sum is 35.

The spelling of 25280505305 in words is "twenty-five billion, two hundred eighty million, five hundred five thousand, three hundred five".