3216645543540 has 384 divisors, whose sum is σ = 10665101551104. Its totient is φ = 714120192000.

The previous prime is 3216645543523. The next prime is 3216645543583. The reversal of 3216645543540 is 453455466123.

It is a self number, because there is not a number n which added to its sum of digits gives 3216645543540.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 715921534 + ... + 715926026.

It is an arithmetic number, because the mean of its divisors is an integer number (27773701956).

Almost surely, 2^{3216645543540} is an apocalyptic number.

3216645543540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216645543540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5332550775552).

3216645543540 is an abundant number, since it is smaller than the sum of its proper divisors (7448456007564).

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

3216645543540 is a wasteful number, since it uses less digits than its factorization.

3216645543540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5171 (or 5169 counting only the distinct ones).

The product of its (nonzero) digits is 5184000, while the sum is 48.

The spelling of 3216645543540 in words is "three trillion, two hundred sixteen billion, six hundred forty-five million, five hundred forty-three thousand, five hundred forty".