1643341208320 has 720 divisors, whose sum is σ = 4854274080768. Its totient is φ = 532200775680.

The previous prime is 1643341208309. The next prime is 1643341208347. The reversal of 1643341208320 is 238021433461.

It is a self number, because there is not a number n which added to its sum of digits gives 1643341208320.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 4477768777 + ... + 4477769143.

Almost surely, 2^{1643341208320} is an apocalyptic number.

1643341208320 is a gapful number since it is divisible by the number (10) 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 1643341208320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2427137040384).

1643341208320 is an abundant number, since it is smaller than the sum of its proper divisors (3210932872448).

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

1643341208320 is an frugal number, since it uses more digits than its factorization.

1643341208320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 494 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The spelling of 1643341208320 in words is "one trillion, six hundred forty-three billion, three hundred forty-one million, two hundred eight thousand, three hundred twenty".