1916918355566 has 16 divisors (see below), whose sum is σ = 2968406023680. Its totient is φ = 927455397240.

The previous prime is 1916918355551. The next prime is 1916918355601. The reversal of 1916918355566 is 6655538196191.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 750356 + ... + 2096871.

It is an arithmetic number, because the mean of its divisors is an integer number (185525376480).

Almost surely, 2^{1916918355566} is an apocalyptic number.

1916918355566 is a deficient number, since it is larger than the sum of its proper divisors (1051487668114).

1916918355566 is a wasteful number, since it uses less digits than its factorization.

1916918355566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2858119.

The product of its digits is 52488000, while the sum is 65.

The spelling of 1916918355566 in words is "one trillion, nine hundred sixteen billion, nine hundred eighteen million, three hundred fifty-five thousand, five hundred sixty-six".