1643405350560 has 192 divisors, whose sum is σ = 5204848803840. Its totient is φ = 435864499200.

The previous prime is 1643405350529. The next prime is 1643405350577. The reversal of 1643405350560 is 650535043461.

It is a super-2 number, since 2×1643405350560² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 123196371 + ... + 123209709.

It is an arithmetic number, because the mean of its divisors is an integer number (27108587520).

Almost surely, 2^{1643405350560} is an apocalyptic number.

1643405350560 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 1643405350560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2602424401920).

1643405350560 is an abundant number, since it is smaller than the sum of its proper divisors (3561443453280).

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

1643405350560 is a wasteful number, since it uses less digits than its factorization.

1643405350560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14731 (or 14723 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 42.

The spelling of 1643405350560 in words is "one trillion, six hundred forty-three billion, four hundred five million, three hundred fifty thousand, five hundred sixty".