1996544809 has 8 divisors (see below), whose sum is σ = 2283452928. Its totient is φ = 1710058560.

The previous prime is 1996544741. The next prime is 1996544843. The reversal of 1996544809 is 9084456991.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1996544809 - 2²¹ = 1994447657 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1996544809.

It is not an unprimeable number, because it can be changed into a prime (1996542809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95257 + ... + 114310.

It is an arithmetic number, because the mean of its divisors is an integer number (285431616).

Almost surely, 2^1996544809 is an apocalyptic number.

It is an amenable number.

1996544809 is a deficient number, since it is larger than the sum of its proper divisors (286908119).

1996544809 is a wasteful number, since it uses less digits than its factorization.

1996544809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210935.

The product of its (nonzero) digits is 2799360, while the sum is 55.

The square root of 1996544809 is about 44682.7126414680. The cubic root of 1996544809 is about 1259.1950870321.

The spelling of 1996544809 in words is "one billion, nine hundred ninety-six million, five hundred forty-four thousand, eight hundred nine".