1968886886813 has 18 divisors (see below), whose sum is σ = 2517478754238. Its totient is φ = 1534197569520.

The previous prime is 1968886886773. The next prime is 1968886886839. The reversal of 1968886886813 is 3186886888691.

It can be written as a sum of positive squares in only one way, i.e., 1850367119524 + 118519767289 = 1360282^2 + 344267^2 .

It is not a de Polignac number, because 1968886886813 - 2²⁰ = 1968885838237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1968886886843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 166032770 + ... + 166044627.

It is an arithmetic number, because the mean of its divisors is an integer number (139859930791).

Almost surely, 2^{1968886886813} is an apocalyptic number.

It is an amenable number.

1968886886813 is a deficient number, since it is larger than the sum of its proper divisors (548591867425).

1968886886813 is a wasteful number, since it uses less digits than its factorization.

1968886886813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332077433 (or 332077415 counting only the distinct ones).

The product of its digits is 1528823808, while the sum is 80.

The spelling of 1968886886813 in words is "one trillion, nine hundred sixty-eight billion, eight hundred eighty-six million, eight hundred eighty-six thousand, eight hundred thirteen".