1916542109073 has 4 divisors (see below), whose sum is σ = 2555389478768. Its totient is φ = 1277694739380.

The previous prime is 1916542109071. The next prime is 1916542109077. The reversal of 1916542109073 is 3709012456191.

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 not a de Polignac number, because 1916542109073 - 2¹ = 1916542109071 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1916542109071) 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, 319423684843 + ... + 319423684848.

It is an arithmetic number, because the mean of its divisors is an integer number (638847369692).

Almost surely, 2^{1916542109073} is an apocalyptic number.

It is an amenable number.

1916542109073 is a deficient number, since it is larger than the sum of its proper divisors (638847369695).

1916542109073 is an equidigital number, since it uses as much as digits as its factorization.

1916542109073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638847369694.

The product of its (nonzero) digits is 408240, while the sum is 48.

The spelling of 1916542109073 in words is "one trillion, nine hundred sixteen billion, five hundred forty-two million, one hundred nine thousand, seventy-three".