1916803855605 has 8 divisors (see below), whose sum is σ = 3066886168992. Its totient is φ = 1022295389648.

The previous prime is 1916803855573. The next prime is 1916803855649. The reversal of 1916803855605 is 5065583086191.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1916803855605 - 2⁵ = 1916803855573 is a prime.

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, 63893461839 + ... + 63893461868.

It is an arithmetic number, because the mean of its divisors is an integer number (383360771124).

Almost surely, 2^{1916803855605} is an apocalyptic number.

1916803855605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1916803855605 is a deficient number, since it is larger than the sum of its proper divisors (1150082313387).

1916803855605 is a wasteful number, since it uses less digits than its factorization.

1916803855605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127786923715.

The product of its (nonzero) digits is 7776000, while the sum is 57.

The spelling of 1916803855605 in words is "one trillion, nine hundred sixteen billion, eight hundred three million, eight hundred fifty-five thousand, six hundred five".