9720049578 has 16 divisors (see below), whose sum is σ = 19559365536. Its totient is φ = 3220138800.

The previous prime is 9720049561. The next prime is 9720049601. The reversal of 9720049578 is 8759400279.

9720049578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 9720049578.

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, 4968373 + ... + 4970328.

It is an arithmetic number, because the mean of its divisors is an integer number (1222460346).

Almost surely, 2^9720049578 is an apocalyptic number.

9720049578 is an abundant number, since it is smaller than the sum of its proper divisors (9839315958).

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

9720049578 is a wasteful number, since it uses less digits than its factorization.

9720049578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9938869.

The product of its (nonzero) digits is 1270080, while the sum is 51.

The square root of 9720049578 is about 98590.3117856922. The cubic root of 9720049578 is about 2134.1396111582.

The spelling of 9720049578 in words is "nine billion, seven hundred twenty million, forty-nine thousand, five hundred seventy-eight".