1916821706768 has 20 divisors (see below), whose sum is σ = 3721468031040. Its totient is φ = 956442860064.

The previous prime is 1916821706759. The next prime is 1916821706771. The reversal of 1916821706768 is 8676071286191.

It is a self number, because there is not a number n which added to its sum of digits gives 1916821706768.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122991548 + ... + 123007131.

It is an arithmetic number, because the mean of its divisors is an integer number (186073401552).

Almost surely, 2^{1916821706768} is an apocalyptic number.

It is an amenable number.

1916821706768 is a deficient number, since it is larger than the sum of its proper divisors (1804646324272).

1916821706768 is a wasteful number, since it uses less digits than its factorization.

1916821706768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245999174 (or 245999168 counting only the distinct ones).

The product of its (nonzero) digits is 12192768, while the sum is 62.

The spelling of 1916821706768 in words is "one trillion, nine hundred sixteen billion, eight hundred twenty-one million, seven hundred six thousand, seven hundred sixty-eight".