16750681643 has 2 divisors, whose sum is σ = 16750681644. Its totient is φ = 16750681642.

The previous prime is 16750681601. The next prime is 16750681657. The reversal of 16750681643 is 34618605761.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16750681643 is a prime.

It is not a weakly prime, because it can be changed into another prime (16750681943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8375340821 + 8375340822.

It is an arithmetic number, because the mean of its divisors is an integer number (8375340822).

Almost surely, 2^16750681643 is an apocalyptic number.

16750681643 is a deficient number, since it is larger than the sum of its proper divisors (1).

16750681643 is an equidigital number, since it uses as much as digits as its factorization.

16750681643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 47.

The spelling of 16750681643 in words is "sixteen billion, seven hundred fifty million, six hundred eighty-one thousand, six hundred forty-three".