9720551311 has 8 divisors (see below), whose sum is σ = 10019320160. Its totient is φ = 9423679968.

The previous prime is 9720551263. The next prime is 9720551353. The reversal of 9720551311 is 1131550279.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9720551311 - 2⁹ = 9720550799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9720551371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 463971 + ... + 484468.

It is an arithmetic number, because the mean of its divisors is an integer number (1252415020).

Almost surely, 2^9720551311 is an apocalyptic number.

9720551311 is a deficient number, since it is larger than the sum of its proper divisors (298768849).

9720551311 is a wasteful number, since it uses less digits than its factorization.

9720551311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 948753.

The product of its (nonzero) digits is 9450, while the sum is 34.

The square root of 9720551311 is about 98592.8562878670. The cubic root of 9720551311 is about 2134.1763307873.

The spelling of 9720551311 in words is "nine billion, seven hundred twenty million, five hundred fifty-one thousand, three hundred eleven".