28645761105 has 48 divisors (see below), whose sum is σ = 55144546560. Its totient is φ = 14102517312.

The previous prime is 28645761071. The next prime is 28645761121. The reversal of 28645761105 is 50116754682.

28645761105 is a `hidden beast` number, since 2 + 8 + 64 + 576 + 1 + 10 + 5 = 666.

It is not a de Polignac number, because 28645761105 - 2¹¹ = 28645759057 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 604969 + ... + 650598.

It is an arithmetic number, because the mean of its divisors is an integer number (1148844720).

Almost surely, 2^28645761105 is an apocalyptic number.

It is an amenable number.

28645761105 is a deficient number, since it is larger than the sum of its proper divisors (26498785455).

28645761105 is a wasteful number, since it uses less digits than its factorization.

28645761105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1255607 (or 1255588 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The spelling of 28645761105 in words is "twenty-eight billion, six hundred forty-five million, seven hundred sixty-one thousand, one hundred five".