28280805780525 has 48 divisors (see below), whose sum is σ = 47250470746560. Its totient is φ = 14924294784000.

The previous prime is 28280805780503. The next prime is 28280805780533. The reversal of 28280805780525 is 52508750808282.

It is a happy number.

It is not a de Polignac number, because 28280805780525 - 2⁷ = 28280805780397 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10778709 + ... + 13143141.

It is an arithmetic number, because the mean of its divisors is an integer number (984384807220).

Almost surely, 2^{28280805780525} is an apocalyptic number.

28280805780525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28280805780525 is a deficient number, since it is larger than the sum of its proper divisors (18969664966035).

28280805780525 is a wasteful number, since it uses less digits than its factorization.

28280805780525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2366126 (or 2366121 counting only the distinct ones).

The product of its (nonzero) digits is 28672000, while the sum is 60.

The spelling of 28280805780525 in words is "twenty-eight trillion, two hundred eighty billion, eight hundred five million, seven hundred eighty thousand, five hundred twenty-five".