1999567104 has 72 divisors (see below), whose sum is σ = 5389292160. Its totient is φ = 658065408.

The previous prime is 1999567091. The next prime is 1999567111. The reversal of 1999567104 is 4017659991.

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, 44194 + ... + 77150.

It is an arithmetic number, because the mean of its divisors is an integer number (74851280).

Almost surely, 2^1999567104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1999567104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2694646080).

1999567104 is an abundant number, since it is smaller than the sum of its proper divisors (3389725056).

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

1999567104 is an equidigital number, since it uses as much as digits as its factorization.

1999567104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33055 (or 33041 counting only the distinct ones).

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 1999567104 is about 44716.5193636535. The cubic root of 1999567104 is about 1259.8301408717.

The spelling of 1999567104 in words is "one billion, nine hundred ninety-nine million, five hundred sixty-seven thousand, one hundred four".