1909718907812 has 12 divisors (see below), whose sum is σ = 3342078633600. Its totient is φ = 954839298216.

The previous prime is 1909718907793. The next prime is 1909718907829. The reversal of 1909718907812 is 2187098179091.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4824728 + ... + 5205519.

It is an arithmetic number, because the mean of its divisors is an integer number (278506552800).

Almost surely, 2^{1909718907812} is an apocalyptic number.

It is an amenable number.

1909718907812 is a deficient number, since it is larger than the sum of its proper divisors (1432359725788).

1909718907812 is a wasteful number, since it uses less digits than its factorization.

1909718907812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10077850 (or 10077848 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 62.

The spelling of 1909718907812 in words is "one trillion, nine hundred nine billion, seven hundred eighteen million, nine hundred seven thousand, eight hundred twelve".