28545575256 has 128 divisors (see below), whose sum is σ = 86580000000. Its totient is φ = 8642350080.

The previous prime is 28545575213. The next prime is 28545575299. The reversal of 28545575256 is 65257554582.

28545575256 is a `hidden beast` number, since 2 + 8 + 5 + 45 + 575 + 25 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (28545575213) and next prime (28545575299).

It is a super-3 number, since 3×28545575256³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2962815 + ... + 2972433.

It is an arithmetic number, because the mean of its divisors is an integer number (676406250).

Almost surely, 2^28545575256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28545575256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43290000000).

28545575256 is an abundant number, since it is smaller than the sum of its proper divisors (58034424744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28545575256 is a wasteful number, since it uses less digits than its factorization.

28545575256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10894 (or 10884 counting only the distinct ones).

The product of its digits is 16800000, while the sum is 54.

The spelling of 28545575256 in words is "twenty-eight billion, five hundred forty-five million, five hundred seventy-five thousand, two hundred fifty-six".