16750681657 has 2 divisors, whose sum is σ = 16750681658. Its totient is φ = 16750681656.

The previous prime is 16750681643. The next prime is 16750681697. The reversal of 16750681657 is 75618605761.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16045035561 + 705646096 = 126669^2 + 26564^2 .

It is a cyclic number.

It is not a de Polignac number, because 16750681657 - 2²³ = 16742293049 is a prime.

It is not a weakly prime, because it can be changed into another prime (16750681697) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8375340828 + 8375340829.

It is an arithmetic number, because the mean of its divisors is an integer number (8375340829).

Almost surely, 2^16750681657 is an apocalyptic number.

It is an amenable number.

16750681657 is a deficient number, since it is larger than the sum of its proper divisors (1).

16750681657 is an equidigital number, since it uses as much as digits as its factorization.

16750681657 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 16750681657 in words is "sixteen billion, seven hundred fifty million, six hundred eighty-one thousand, six hundred fifty-seven".