25280505305503 has 16 divisors (see below), whose sum is σ = 29472079025664. Its totient is φ = 21237233260320.

The previous prime is 25280505305479. The next prime is 25280505305509. The reversal of 25280505305503 is 30550350508252.

It is not a de Polignac number, because 25280505305503 - 2²⁵ = 25280471751071 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25280505305503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25280505305509) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136717243 + ... + 136902028.

It is an arithmetic number, because the mean of its divisors is an integer number (1842004939104).

Almost surely, 2^{25280505305503} is an apocalyptic number.

25280505305503 is a deficient number, since it is larger than the sum of its proper divisors (4191573720161).

25280505305503 is a wasteful number, since it uses less digits than its factorization.

25280505305503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273619542.

The product of its (nonzero) digits is 900000, while the sum is 43.

The spelling of 25280505305503 in words is "twenty-five trillion, two hundred eighty billion, five hundred five million, three hundred five thousand, five hundred three".