1919944616 has 32 divisors (see below), whose sum is σ = 3626448840. Its totient is φ = 952919808.

The previous prime is 1919944601. The next prime is 1919944627. The reversal of 1919944616 is 6164499191.

It can be written as a sum of positive squares in 4 ways, for example, as 1533035716 + 386908900 = 39154^2 + 19670^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 647810 + ... + 650766.

Almost surely, 2^1919944616 is an apocalyptic number.

It is an amenable number.

1919944616 is a deficient number, since it is larger than the sum of its proper divisors (1706504224).

1919944616 is a wasteful number, since it uses less digits than its factorization.

1919944616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3533 (or 3529 counting only the distinct ones).

The product of its digits is 419904, while the sum is 50.

The square root of 1919944616 is about 43817.1726153115. The cubic root of 1919944616 is about 1242.8810515052.

The spelling of 1919944616 in words is "one billion, nine hundred nineteen million, nine hundred forty-four thousand, six hundred sixteen".