28510751128825 has 48 divisors (see below), whose sum is σ = 40687595827200. Its totient is φ = 19413303117120.

The previous prime is 28510751128819. The next prime is 28510751128837. The reversal of 28510751128825 is 52882115701582.

It is a happy number.

It is not a de Polignac number, because 28510751128825 - 2¹¹ = 28510751126777 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16703172 + ... + 18330778.

It is an arithmetic number, because the mean of its divisors is an integer number (847658246400).

Almost surely, 2^{28510751128825} is an apocalyptic number.

28510751128825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28510751128825 is a deficient number, since it is larger than the sum of its proper divisors (12176844698375).

28510751128825 is a wasteful number, since it uses less digits than its factorization.

28510751128825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1628326 (or 1628321 counting only the distinct ones).

The product of its (nonzero) digits is 3584000, while the sum is 55.

The spelling of 28510751128825 in words is "twenty-eight trillion, five hundred ten billion, seven hundred fifty-one million, one hundred twenty-eight thousand, eight hundred twenty-five".