1916807427361 has 4 divisors (see below), whose sum is σ = 1936568328772. Its totient is φ = 1897046525952.

The previous prime is 1916807427329. The next prime is 1916807427407. The reversal of 1916807427361 is 1637247086191.

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 1327069440225 + 589737987136 = 1151985^2 + 767944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1916807427361 - 2⁵ = 1916807427329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1916807427961) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9880450560 + ... + 9880450753.

It is an arithmetic number, because the mean of its divisors is an integer number (484142082193).

Almost surely, 2^{1916807427361} is an apocalyptic number.

It is an amenable number.

1916807427361 is a deficient number, since it is larger than the sum of its proper divisors (19760901411).

1916807427361 is an equidigital number, since it uses as much as digits as its factorization.

1916807427361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19760901410.

The product of its (nonzero) digits is 3048192, while the sum is 55.

The spelling of 1916807427361 in words is "one trillion, nine hundred sixteen billion, eight hundred seven million, four hundred twenty-seven thousand, three hundred sixty-one".