1916691964 has 12 divisors (see below), whose sum is σ = 3659139288. Its totient is φ = 871223600.

The previous prime is 1916691949. The next prime is 1916691971. The reversal of 1916691964 is 4691966191.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21780547 + ... + 21780634.

It is an arithmetic number, because the mean of its divisors is an integer number (304928274).

Almost surely, 2^1916691964 is an apocalyptic number.

It is an amenable number.

1916691964 is a deficient number, since it is larger than the sum of its proper divisors (1742447324).

1916691964 is a wasteful number, since it uses less digits than its factorization.

1916691964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43561196 (or 43561194 counting only the distinct ones).

The product of its digits is 629856, while the sum is 52.

The square root of 1916691964 is about 43780.0407034987. The cubic root of 1916691964 is about 1242.1787839160.

The spelling of 1916691964 in words is "one billion, nine hundred sixteen million, six hundred ninety-one thousand, nine hundred sixty-four".