1916072143889 has 4 divisors (see below), whose sum is σ = 1916201178480. Its totient is φ = 1915943109300.

The previous prime is 1916072143849. The next prime is 1916072143919. The reversal of 1916072143889 is 9883412706191.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1916072143889 - 2¹⁶ = 1916072078353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1916072143849) 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, 64495019 + ... + 64524720.

It is an arithmetic number, because the mean of its divisors is an integer number (479050294620).

Almost surely, 2^{1916072143889} is an apocalyptic number.

It is an amenable number.

1916072143889 is a deficient number, since it is larger than the sum of its proper divisors (129034591).

1916072143889 is a wasteful number, since it uses less digits than its factorization.

1916072143889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129034590.

The product of its (nonzero) digits is 5225472, while the sum is 59.

The spelling of 1916072143889 in words is "one trillion, nine hundred sixteen billion, seventy-two million, one hundred forty-three thousand, eight hundred eighty-nine".