845561712 has 80 divisors (see below), whose sum is σ = 2304495360. Its totient is φ = 266420736.

The previous prime is 845561699. The next prime is 845561741. The reversal of 845561712 is 217165548.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 589348 + ... + 590780.

It is an arithmetic number, because the mean of its divisors is an integer number (28806192).

Almost surely, 2^845561712 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 845561712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1152247680).

845561712 is an abundant number, since it is smaller than the sum of its proper divisors (1458933648).

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

845561712 is a wasteful number, since it uses less digits than its factorization.

845561712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110 (or 2104 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 845561712 is about 29078.5438424967. The cubic root of 845561712 is about 945.6166340219.

It can be divided in two parts, 84556 and 1712, that added together give a palindrome (86268).

The spelling of 845561712 in words is "eight hundred forty-five million, five hundred sixty-one thousand, seven hundred twelve".