1643453071003 has 12 divisors (see below), whose sum is σ = 1774433381872. Its totient is φ = 1521422305920.

The previous prime is 1643453070923. The next prime is 1643453071009. The reversal of 1643453071003 is 3001703543461.

It is a de Polignac number, because none of the positive numbers 2^k-1643453071003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1643453071009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46594575 + ... + 46629832.

Almost surely, 2^{1643453071003} is an apocalyptic number.

1643453071003 is a deficient number, since it is larger than the sum of its proper divisors (130980310869).

1643453071003 is an equidigital number, since it uses as much as digits as its factorization.

1643453071003 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93224502 (or 93224485 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 1643453071003 in words is "one trillion, six hundred forty-three billion, four hundred fifty-three million, seventy-one thousand, three".