10561720008 has 128 divisors (see below), whose sum is σ = 31168800000. Its totient is φ = 2919960576.

The previous prime is 10561720003. The next prime is 10561720021. The reversal of 10561720008 is 80002716501.

It is a super-2 number, since 2×10561720008² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10561720003) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 641868 + ... + 658116.

It is an arithmetic number, because the mean of its divisors is an integer number (243506250).

Almost surely, 2^10561720008 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10561720008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15584400000).

10561720008 is an abundant number, since it is smaller than the sum of its proper divisors (20607079992).

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

10561720008 is a wasteful number, since it uses less digits than its factorization.

10561720008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16391 (or 16387 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 30.

The spelling of 10561720008 in words is "ten billion, five hundred sixty-one million, seven hundred twenty thousand, eight".