99873696784 has 75 divisors (see below), whose sum is σ = 202652768635. Its totient is φ = 47682304640.

The previous prime is 99873696731. The next prime is 99873696847. The reversal of 99873696784 is 48769637899.

It is a happy number.

The square root of 99873696784 is 316028.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 2 ways, for example, as 81551367184 + 18322329600 = 285572^2 + 135360^2 .

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 99873696784.

It is an unprimeable number.

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 14 ways as a sum of consecutive naturals, for example, 2124972249 + ... + 2124972295.

Almost surely, 2^99873696784 is an apocalyptic number.

99873696784 is a gapful number since it is divisible by the number (94) formed by its first and last digit.

99873696784 is the 316028-th square number.

It is an amenable number.

99873696784 is an abundant number, since it is smaller than the sum of its proper divisors (102779071851).

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

99873696784 is an frugal number, since it uses more digits than its factorization.

99873696784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 90 counting only the distinct ones).

The product of its digits is 987614208, while the sum is 76.

The spelling of 99873696784 in words is "ninety-nine billion, eight hundred seventy-three million, six hundred ninety-six thousand, seven hundred eighty-four".