28505019575 has 12 divisors (see below), whose sum is σ = 35945314680. Its totient is φ = 22417505760.

The previous prime is 28505019563. The next prime is 28505019577. The reversal of 28505019575 is 57591050582.

It is not a de Polignac number, because 28505019575 - 2⁶ = 28505019511 is a prime.

It is a super-2 number, since 2×28505019575² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28505019577) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9661244 + ... + 9664193.

It is an arithmetic number, because the mean of its divisors is an integer number (2995442890).

Almost surely, 2^28505019575 is an apocalyptic number.

28505019575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28505019575 is a deficient number, since it is larger than the sum of its proper divisors (7440295105).

28505019575 is a wasteful number, since it uses less digits than its factorization.

28505019575 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19325506 (or 19325501 counting only the distinct ones).

The product of its (nonzero) digits is 630000, while the sum is 47.

The spelling of 28505019575 in words is "twenty-eight billion, five hundred five million, nineteen thousand, five hundred seventy-five".