3185643216 has 160 divisors (see below), whose sum is σ = 9569387520. Its totient is φ = 894440448.

The previous prime is 3185643203. The next prime is 3185643217. The reversal of 3185643216 is 6123465813.

3185643216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3185643217) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9180355 + ... + 9180701.

It is an arithmetic number, because the mean of its divisors is an integer number (59808672).

Almost surely, 2^3185643216 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 3185643216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4784693760).

3185643216 is an abundant number, since it is smaller than the sum of its proper divisors (6383744304).

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

3185643216 is a wasteful number, since it uses less digits than its factorization.

3185643216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 761 (or 755 counting only the distinct ones).

The product of its digits is 103680, while the sum is 39.

The square root of 3185643216 is about 56441.5026022518. The cubic root of 3185643216 is about 1471.4055102733.

The spelling of 3185643216 in words is "three billion, one hundred eighty-five million, six hundred forty-three thousand, two hundred sixteen".