1999941616 has 20 divisors (see below), whose sum is σ = 4008504600. Its totient is φ = 965488832.

The previous prime is 1999941611. The next prime is 1999941631. The reversal of 1999941616 is 6161499991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1999941611) by changing a digit.

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, 2154646 + ... + 2155573.

It is an arithmetic number, because the mean of its divisors is an integer number (200425230).

Almost surely, 2^1999941616 is an apocalyptic number.

1999941616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1999941616 is an abundant number, since it is smaller than the sum of its proper divisors (2008562984).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1999941616 is a wasteful number, since it uses less digits than its factorization.

1999941616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4310256 (or 4310250 counting only the distinct ones).

The product of its digits is 944784, while the sum is 55.

The square root of 1999941616 is about 44720.7067922679. The cubic root of 1999941616 is about 1259.9087899038.

The spelling of 1999941616 in words is "one billion, nine hundred ninety-nine million, nine hundred forty-one thousand, six hundred sixteen".