1643280343275 has 48 divisors (see below), whose sum is σ = 2726889376640. Its totient is φ = 873196588800.

The previous prime is 1643280343193. The next prime is 1643280343297. The reversal of 1643280343275 is 5723430823461.

It is not a de Polignac number, because 1643280343275 - 2¹⁶ = 1643280277739 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 22360791 + ... + 22434159.

Almost surely, 2^{1643280343275} is an apocalyptic number.

1643280343275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1643280343275 is a deficient number, since it is larger than the sum of its proper divisors (1083609033365).

1643280343275 is a wasteful number, since it uses less digits than its factorization.

1643280343275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74476 (or 74471 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 48.

The spelling of 1643280343275 in words is "one trillion, six hundred forty-three billion, two hundred eighty million, three hundred forty-three thousand, two hundred seventy-five".