1020568693817 has 2 divisors, whose sum is σ = 1020568693818. Its totient is φ = 1020568693816.

The previous prime is 1020568693813. The next prime is 1020568693847. The reversal of 1020568693817 is 7183968650201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 731018160016 + 289550533801 = 854996^2 + 538099^2 .

It is a cyclic number.

It is not a de Polignac number, because 1020568693817 - 2² = 1020568693813 is a prime.

It is not a weakly prime, because it can be changed into another prime (1020568693813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510284346908 + 510284346909.

It is an arithmetic number, because the mean of its divisors is an integer number (510284346909).

Almost surely, 2^{1020568693817} is an apocalyptic number.

It is an amenable number.

1020568693817 is a deficient number, since it is larger than the sum of its proper divisors (1).

1020568693817 is an equidigital number, since it uses as much as digits as its factorization.

1020568693817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 1020568693817 in words is "one trillion, twenty billion, five hundred sixty-eight million, six hundred ninety-three thousand, eight hundred seventeen".