3216963856 has 80 divisors (see below), whose sum is σ = 6708588480. Its totient is φ = 1489080320.

The previous prime is 3216963847. The next prime is 3216963857. The reversal of 3216963856 is 6583696123.

It is a happy number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (3216963857) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4881255 + ... + 4881913.

It is an arithmetic number, because the mean of its divisors is an integer number (83857356).

Almost surely, 2^3216963856 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 3216963856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3354294240).

3216963856 is an abundant number, since it is smaller than the sum of its proper divisors (3491624624).

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

3216963856 is a wasteful number, since it uses less digits than its factorization.

3216963856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952 (or 946 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 49.

The square root of 3216963856 is about 56718.2850234384. The cubic root of 3216963856 is about 1476.2119857199.

The spelling of 3216963856 in words is "three billion, two hundred sixteen million, nine hundred sixty-three thousand, eight hundred fifty-six".