28505025263 has 16 divisors (see below), whose sum is σ = 33496010016. Its totient is φ = 23914880640.

The previous prime is 28505025217. The next prime is 28505025277. The reversal of 28505025263 is 36252050582.

It is a cyclic number.

It is not a de Polignac number, because 28505025263 - 2¹⁶ = 28504959727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505025863) 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, 688745 + ... + 728957.

It is an arithmetic number, because the mean of its divisors is an integer number (2093500626).

Almost surely, 2^28505025263 is an apocalyptic number.

28505025263 is a deficient number, since it is larger than the sum of its proper divisors (4990984753).

28505025263 is a wasteful number, since it uses less digits than its factorization.

28505025263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45194.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 28505025263 in words is "twenty-eight billion, five hundred five million, twenty-five thousand, two hundred sixty-three".