845640728336 has 40 divisors (see below), whose sum is σ = 1664440879680. Its totient is φ = 416119423104.

The previous prime is 845640728329. The next prime is 845640728371. The reversal of 845640728336 is 633827046548.

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 7 ways as a sum of consecutive naturals, for example, 777005 + ... + 1514931.

It is an arithmetic number, because the mean of its divisors is an integer number (41611021992).

Almost surely, 2^845640728336 is an apocalyptic number.

It is an amenable number.

845640728336 is a deficient number, since it is larger than the sum of its proper divisors (818800151344).

845640728336 is a wasteful number, since it uses less digits than its factorization.

845640728336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739071 (or 739065 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 56.

The spelling of 845640728336 in words is "eight hundred forty-five billion, six hundred forty million, seven hundred twenty-eight thousand, three hundred thirty-six".