9999980072 has 16 divisors (see below), whose sum is σ = 18751570740. Its totient is φ = 4999561216.

The previous prime is 9999980059. The next prime is 9999980077. The reversal of 9999980072 is 2700899999.

It can be written as a sum of positive squares in 2 ways, for example, as 8735893156 + 1264086916 = 93466^2 + 35554^2 .

It is a junction number, because it is equal to n+sod(n) for n = 9999979987 and 9999980014.

It is not an unprimeable number, because it can be changed into a prime (9999980077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59558 + ... + 153450.

Almost surely, 2^9999980072 is an apocalyptic number.

It is an amenable number.

9999980072 is a deficient number, since it is larger than the sum of its proper divisors (8751590668).

9999980072 is a wasteful number, since it uses less digits than its factorization.

9999980072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107212 (or 107208 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 62.

The square root of 9999980072 is about 99999.9003599504. The cubic root of 9999980072 is about 2154.4332589118.

The spelling of 9999980072 in words is "nine billion, nine hundred ninety-nine million, nine hundred eighty thousand, seventy-two".