2019649964 has 24 divisors (see below), whose sum is σ = 3698563680. Its totient is φ = 963167744.

The previous prime is 2019649949. The next prime is 2019650021. The reversal of 2019649964 is 4699469102.

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, 1382 + ... + 63570.

It is an arithmetic number, because the mean of its divisors is an integer number (154106820).

Almost surely, 2^2019649964 is an apocalyptic number.

It is an amenable number.

2019649964 is a deficient number, since it is larger than the sum of its proper divisors (1678913716).

2019649964 is a wasteful number, since it uses less digits than its factorization.

2019649964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62569 (or 62567 counting only the distinct ones).

The product of its (nonzero) digits is 839808, while the sum is 50.

The square root of 2019649964 is about 44940.5158403862. The cubic root of 2019649964 is about 1264.0338436633.

The spelling of 2019649964 in words is "two billion, nineteen million, six hundred forty-nine thousand, nine hundred sixty-four".