28551681104 has 10 divisors (see below), whose sum is σ = 55318882170. Its totient is φ = 14275840544.

The previous prime is 28551681079. The next prime is 28551681107. The reversal of 28551681104 is 40118615582.

It can be written as a sum of positive squares in only one way, i.e., 19251007504 + 9300673600 = 138748^2 + 96440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551681107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 892240019 + ... + 892240050.

It is an arithmetic number, because the mean of its divisors is an integer number (5531888217).

Almost surely, 2^28551681104 is an apocalyptic number.

It is an amenable number.

28551681104 is a deficient number, since it is larger than the sum of its proper divisors (26767201066).

28551681104 is a wasteful number, since it uses less digits than its factorization.

28551681104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1784480077 (or 1784480071 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 41.

The spelling of 28551681104 in words is "twenty-eight billion, five hundred fifty-one million, six hundred eighty-one thousand, one hundred four".