1968960997009 has 2 divisors, whose sum is σ = 1968960997010. Its totient is φ = 1968960997008.

The previous prime is 1968960997007. The next prime is 1968960997013. The reversal of 1968960997009 is 9007990698691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1333158890625 + 635802106384 = 1154625^2 + 797372^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968960997009 - 2¹ = 1968960997007 is a prime.

Together with 1968960997007, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1968960997007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984480498504 + 984480498505.

It is an arithmetic number, because the mean of its divisors is an integer number (984480498505).

Almost surely, 2^{1968960997009} is an apocalyptic number.

It is an amenable number.

1968960997009 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968960997009 is an equidigital number, since it uses as much as digits as its factorization.

1968960997009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 119042784, while the sum is 73.

The spelling of 1968960997009 in words is "one trillion, nine hundred sixty-eight billion, nine hundred sixty million, nine hundred ninety-seven thousand, nine".