1683965116709 has 2 divisors, whose sum is σ = 1683965116710. Its totient is φ = 1683965116708.

The previous prime is 1683965116699. The next prime is 1683965116721. The reversal of 1683965116709 is 9076115693861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1399985904100 + 283979212609 = 1183210^2 + 532897^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1683965116709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1683965116609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 841982558354 + 841982558355.

It is an arithmetic number, because the mean of its divisors is an integer number (841982558355).

Almost surely, 2^{1683965116709} is an apocalyptic number.

It is an amenable number.

1683965116709 is a deficient number, since it is larger than the sum of its proper divisors (1).

1683965116709 is an equidigital number, since it uses as much as digits as its factorization.

1683965116709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14696640, while the sum is 62.

The spelling of 1683965116709 in words is "one trillion, six hundred eighty-three billion, nine hundred sixty-five million, one hundred sixteen thousand, seven hundred nine".