28585816845 has 24 divisors (see below), whose sum is σ = 46880100768. Its totient is φ = 14873907840.

The previous prime is 28585816807. The next prime is 28585816907. The reversal of 28585816845 is 54861858582.

It is not a de Polignac number, because 28585816845 - 2⁶ = 28585816781 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 541627 + ... + 592056.

It is an arithmetic number, because the mean of its divisors is an integer number (1953337532).

Almost surely, 2^28585816845 is an apocalyptic number.

It is an amenable number.

28585816845 is a deficient number, since it is larger than the sum of its proper divisors (18294283923).

28585816845 is a wasteful number, since it uses less digits than its factorization.

28585816845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1133773 (or 1133732 counting only the distinct ones).

The product of its digits is 24576000, while the sum is 60.

The spelling of 28585816845 in words is "twenty-eight billion, five hundred eighty-five million, eight hundred sixteen thousand, eight hundred forty-five".