1999907828899 has 16 divisors (see below), whose sum is σ = 2055980893824. Its totient is φ = 1944275860800.

The previous prime is 1999907828843. The next prime is 1999907828921. The reversal of 1999907828899 is 9988287099991.

It is a cyclic number.

It is not a de Polignac number, because 1999907828899 - 2²⁵ = 1999874274467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1999907828819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27325344 + ... + 27398434.

It is an arithmetic number, because the mean of its divisors is an integer number (128498805864).

Almost surely, 2^{1999907828899} is an apocalyptic number.

1999907828899 is a deficient number, since it is larger than the sum of its proper divisors (56073064925).

1999907828899 is a wasteful number, since it uses less digits than its factorization.

1999907828899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76098.

The product of its (nonzero) digits is 3809369088, while the sum is 88.

The spelling of 1999907828899 in words is "one trillion, nine hundred ninety-nine billion, nine hundred seven million, eight hundred twenty-eight thousand, eight hundred ninety-nine".