2019861616 has 20 divisors (see below), whose sum is σ = 3925994752. Its totient is φ = 1006701696.

The previous prime is 2019861583. The next prime is 2019861619. The reversal of 2019861616 is 6161689102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2019861619) 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 3 ways as a sum of consecutive naturals, for example, 196656 + ... + 206671.

Almost surely, 2^2019861616 is an apocalyptic number.

It is an amenable number.

2019861616 is a deficient number, since it is larger than the sum of its proper divisors (1906133136).

2019861616 is a wasteful number, since it uses less digits than its factorization.

2019861616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403648 (or 403642 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 2019861616 is about 44942.8705803268. The cubic root of 2019861616 is about 1264.0779975103.

The spelling of 2019861616 in words is "two billion, nineteen million, eight hundred sixty-one thousand, six hundred sixteen".