199944519700 has 18 divisors (see below), whose sum is σ = 433879607966. Its totient is φ = 79977807840.

The previous prime is 199944519689. The next prime is 199944519703. The reversal of 199944519700 is 7915449991.

It can be written as a sum of positive squares in 3 ways, for example, as 560837124 + 199383682576 = 23682^2 + 446524^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (199944519703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 999722499 + ... + 999722698.

Almost surely, 2^199944519700 is an apocalyptic number.

199944519700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199944519700 is an abundant number, since it is smaller than the sum of its proper divisors (233935088266).

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

199944519700 is a wasteful number, since it uses less digits than its factorization.

199944519700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1999445211 (or 1999445204 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 58.

The spelling of 199944519700 in words is "one hundred ninety-nine billion, nine hundred forty-four million, five hundred nineteen thousand, seven hundred".