1916821706771 has 2 divisors, whose sum is σ = 1916821706772. Its totient is φ = 1916821706770.

The previous prime is 1916821706759. The next prime is 1916821706801. The reversal of 1916821706771 is 1776071286191.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1916821706771 - 2⁶ = 1916821706707 is a prime.

It is not a weakly prime, because it can be changed into another prime (1916821706971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 958410853385 + 958410853386.

It is an arithmetic number, because the mean of its divisors is an integer number (958410853386).

Almost surely, 2^{1916821706771} is an apocalyptic number.

1916821706771 is a deficient number, since it is larger than the sum of its proper divisors (1).

1916821706771 is an equidigital number, since it uses as much as digits as its factorization.

1916821706771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1778112, while the sum is 56.

The spelling of 1916821706771 in words is "one trillion, nine hundred sixteen billion, eight hundred twenty-one million, seven hundred six thousand, seven hundred seventy-one".