10000721868 has 24 divisors (see below), whose sum is σ = 23346575280. Its totient is φ = 3331922880.

The previous prime is 10000721813. The next prime is 10000721917. The reversal of 10000721868 is 86812700001.

It is a happy number.

10000721868 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 7 ways as a sum of consecutive naturals, for example, 181023 + ... + 229718.

It is an arithmetic number, because the mean of its divisors is an integer number (972773970).

Almost surely, 2^10000721868 is an apocalyptic number.

It is an amenable number.

10000721868 is an abundant number, since it is smaller than the sum of its proper divisors (13345853412).

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

10000721868 is a wasteful number, since it uses less digits than its factorization.

10000721868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412777 (or 412775 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 33.

The spelling of 10000721868 in words is "ten billion, seven hundred twenty-one thousand, eight hundred sixty-eight".