845636616 has 96 divisors (see below), whose sum is σ = 2540959200. Its totient is φ = 251896320.

The previous prime is 845636609. The next prime is 845636621. The reversal of 845636616 is 616636548.

845636616 is a `hidden beast` number, since 8 + 4 + 5 + 636 + 6 + 1 + 6 = 666.

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, 37680 + ... + 55776.

It is an arithmetic number, because the mean of its divisors is an integer number (26468325).

Almost surely, 2^845636616 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 845636616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1270479600).

845636616 is an abundant number, since it is smaller than the sum of its proper divisors (1695322584).

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

845636616 is a wasteful number, since it uses less digits than its factorization.

845636616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18179 (or 18172 counting only the distinct ones).

The product of its digits is 622080, while the sum is 45.

The square root of 845636616 is about 29079.8317739288. The cubic root of 845636616 is about 945.6445556492.

The spelling of 845636616 in words is "eight hundred forty-five million, six hundred thirty-six thousand, six hundred sixteen".