1649819996 has 18 divisors (see below), whose sum is σ = 3173518320. Its totient is φ = 749917960.

The previous prime is 1649819959. The next prime is 1649819999. The reversal of 1649819996 is 6999189461.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1649819999) 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 5 ways as a sum of consecutive naturals, for example, 1703876 + ... + 1704843.

Almost surely, 2^1649819996 is an apocalyptic number.

It is an amenable number.

1649819996 is a deficient number, since it is larger than the sum of its proper divisors (1523698324).

1649819996 is a wasteful number, since it uses less digits than its factorization.

1649819996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408745 (or 3408732 counting only the distinct ones).

The product of its digits is 7558272, while the sum is 62.

The square root of 1649819996 is about 40617.9762666729. The cubic root of 1649819996 is about 1181.6227782863.

The spelling of 1649819996 in words is "one billion, six hundred forty-nine million, eight hundred nineteen thousand, nine hundred ninety-six".