1968713142497 has 4 divisors (see below), whose sum is σ = 2084519797956. Its totient is φ = 1852906487040.

The previous prime is 1968713142491. The next prime is 1968713142499. The reversal of 1968713142497 is 7942413178691.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1161116157601 + 807596984896 = 1077551^2 + 898664^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968713142497 - 2²⁸ = 1968444707041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1968713142491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57903327704 + ... + 57903327737.

It is an arithmetic number, because the mean of its divisors is an integer number (521129949489).

Almost surely, 2^{1968713142497} is an apocalyptic number.

1968713142497 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

1968713142497 is a deficient number, since it is larger than the sum of its proper divisors (115806655459).

1968713142497 is a wasteful number, since it uses less digits than its factorization.

1968713142497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115806655458.

The product of its digits is 18289152, while the sum is 62.

The spelling of 1968713142497 in words is "one trillion, nine hundred sixty-eight billion, seven hundred thirteen million, one hundred forty-two thousand, four hundred ninety-seven".