1916311563 has 12 divisors (see below), whose sum is σ = 2814921720. Its totient is φ = 1255887456.

The previous prime is 1916311559. The next prime is 1916311571. The reversal of 1916311563 is 3651136191.

1916311563 is a `hidden beast` number, since 1 + 9 + 1 + 631 + 15 + 6 + 3 = 666.

It is not a de Polignac number, because 1916311563 - 2² = 1916311559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1916311583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1803906 + ... + 1804967.

It is an arithmetic number, because the mean of its divisors is an integer number (234576810).

Almost surely, 2^1916311563 is an apocalyptic number.

1916311563 is a deficient number, since it is larger than the sum of its proper divisors (898610157).

1916311563 is a wasteful number, since it uses less digits than its factorization.

1916311563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3608938 (or 3608935 counting only the distinct ones).

The product of its digits is 14580, while the sum is 36.

The square root of 1916311563 is about 43775.6960310170. The cubic root of 1916311563 is about 1242.0966011197.

The spelling of 1916311563 in words is "one billion, nine hundred sixteen million, three hundred eleven thousand, five hundred sixty-three".