1999999999836 has 96 divisors (see below), whose sum is σ = 5440522214400. Its totient is φ = 634157916480.

The previous prime is 1999999999817. The next prime is 1999999999847. The reversal of 1999999999836 is 6389999999991.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1774576 + ... + 2673783.

It is an arithmetic number, because the mean of its divisors is an integer number (56672106400).

Almost surely, 2^{1999999999836} is an apocalyptic number.

It is an amenable number.

1999999999836 is an abundant number, since it is smaller than the sum of its proper divisors (3440522214564).

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

1999999999836 is a wasteful number, since it uses less digits than its factorization.

1999999999836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448576 (or 4448568 counting only the distinct ones).

The product of its digits is 55788550416, while the sum is 99.

The spelling of 1999999999836 in words is "one trillion, nine hundred ninety-nine billion, nine hundred ninety-nine million, nine hundred ninety-nine thousand, eight hundred thirty-six".