1919118808069 has 4 divisors (see below), whose sum is σ = 1919126645100. Its totient is φ = 1919110971040.

The previous prime is 1919118808063. The next prime is 1919118808109. The reversal of 1919118808069 is 9608088119191.

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 922825367044 + 996293441025 = 960638^2 + 998145^2 .

It is a cyclic number.

It is not a de Polignac number, because 1919118808069 - 2¹¹ = 1919118806021 is a prime.

It is a super-3 number, since 3×1919118808069³ (a number of 38 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1919118807998 and 1919118808016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919118808063) by changing a digit.

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, 3538942 + ... + 4045039.

It is an arithmetic number, because the mean of its divisors is an integer number (479781661275).

Almost surely, 2^{1919118808069} is an apocalyptic number.

It is an amenable number.

1919118808069 is a deficient number, since it is larger than the sum of its proper divisors (7837031).

1919118808069 is an equidigital number, since it uses as much as digits as its factorization.

1919118808069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7837030.

The product of its (nonzero) digits is 2239488, while the sum is 61.

The spelling of 1919118808069 in words is "one trillion, nine hundred nineteen billion, one hundred eighteen million, eight hundred eight thousand, sixty-nine".