28645581546 has 48 divisors (see below), whose sum is σ = 64227945600. Its totient is φ = 9216061344.

The previous prime is 28645581533. The next prime is 28645581551. The reversal of 28645581546 is 64518554682.

28645581546 is a `hidden beast` number, since 2 + 8 + 6 + 4 + 5 + 581 + 54 + 6 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28645581492 and 28645581501.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1833315 + ... + 1848873.

It is an arithmetic number, because the mean of its divisors is an integer number (1338082200).

Almost surely, 2^28645581546 is an apocalyptic number.

28645581546 is an abundant number, since it is smaller than the sum of its proper divisors (35582364054).

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

28645581546 is a wasteful number, since it uses less digits than its factorization.

28645581546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19123 (or 19120 counting only the distinct ones).

The product of its digits is 9216000, while the sum is 54.

The spelling of 28645581546 in words is "twenty-eight billion, six hundred forty-five million, five hundred eighty-one thousand, five hundred forty-six".