3216691493568 has 448 divisors, whose sum is σ = 11393453260800. Its totient is φ = 870479447040.

The previous prime is 3216691493551. The next prime is 3216691493569. The reversal of 3216691493568 is 8653941966123.

3216691493568 is a `hidden beast` number, since 3 + 2 + 1 + 6 + 6 + 91 + 493 + 56 + 8 = 666.

3216691493568 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (3216691493569) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17532613 + ... + 17715131.

Almost surely, 2^{3216691493568} 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 3216691493568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5696726630400).

3216691493568 is an abundant number, since it is smaller than the sum of its proper divisors (8176761767232).

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

3216691493568 is a wasteful number, since it uses less digits than its factorization.

3216691493568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182625 (or 182609 counting only the distinct ones).

The product of its digits is 50388480, while the sum is 63.

The spelling of 3216691493568 in words is "three trillion, two hundred sixteen billion, six hundred ninety-one million, four hundred ninety-three thousand, five hundred sixty-eight".