199905685716 has 24 divisors (see below), whose sum is σ = 508850836704. Its totient is φ = 60577480480.

The previous prime is 199905685709. The next prime is 199905685787. The reversal of 199905685716 is 617586509991.

199905685716 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 757218375 + ... + 757218638.

It is an arithmetic number, because the mean of its divisors is an integer number (21202118196).

Almost surely, 2^199905685716 is an apocalyptic number.

It is an amenable number.

199905685716 is an abundant number, since it is smaller than the sum of its proper divisors (308945150988).

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

199905685716 is a wasteful number, since it uses less digits than its factorization.

199905685716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1514437031 (or 1514437029 counting only the distinct ones).

The product of its (nonzero) digits is 36741600, while the sum is 66.

The spelling of 199905685716 in words is "one hundred ninety-nine billion, nine hundred five million, six hundred eighty-five thousand, seven hundred sixteen".