9720051081 has 8 divisors (see below), whose sum is σ = 13956996480. Its totient is φ = 5981569872.

The previous prime is 9720051041. The next prime is 9720051109. The reversal of 9720051081 is 1801500279.

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

It is not a de Polignac number, because 9720051081 - 2¹⁰ = 9720050057 is a prime.

It is a super-2 number, since 2×9720051081² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9720051041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124616001 + ... + 124616078.

It is an arithmetic number, because the mean of its divisors is an integer number (1744624560).

Almost surely, 2^9720051081 is an apocalyptic number.

It is an amenable number.

9720051081 is a deficient number, since it is larger than the sum of its proper divisors (4236945399).

9720051081 is a wasteful number, since it uses less digits than its factorization.

9720051081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249232095.

The product of its (nonzero) digits is 5040, while the sum is 33.

The square root of 9720051081 is about 98590.3194081447. The cubic root of 9720051081 is about 2134.1397211580.

The spelling of 9720051081 in words is "nine billion, seven hundred twenty million, fifty-one thousand, eighty-one".