28251163536 has 160 divisors (see below), whose sum is σ = 79674900480. Its totient is φ = 8592998400.

The previous prime is 28251163531. The next prime is 28251163553. The reversal of 28251163536 is 63536115282.

It is a super-2 number, since 2×28251163536² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28251163531) 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 31 ways as a sum of consecutive naturals, for example, 6302416 + ... + 6306896.

It is an arithmetic number, because the mean of its divisors is an integer number (497968128).

Almost surely, 2^28251163536 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 28251163536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39837450240).

28251163536 is an abundant number, since it is smaller than the sum of its proper divisors (51423736944).

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

28251163536 is a wasteful number, since it uses less digits than its factorization.

28251163536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4765 (or 4759 counting only the distinct ones).

The product of its digits is 259200, while the sum is 42.

The spelling of 28251163536 in words is "twenty-eight billion, two hundred fifty-one million, one hundred sixty-three thousand, five hundred thirty-six".