9872145722 has 32 divisors (see below), whose sum is σ = 15751411200. Its totient is φ = 4632163200.

The previous prime is 9872145719. The next prime is 9872145743. The reversal of 9872145722 is 2275412789.

It is a super-2 number, since 2×9872145722² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 636779 + ... + 652097.

It is an arithmetic number, because the mean of its divisors is an integer number (492231600).

Almost surely, 2^9872145722 is an apocalyptic number.

9872145722 is a deficient number, since it is larger than the sum of its proper divisors (5879265478).

9872145722 is a wasteful number, since it uses less digits than its factorization.

9872145722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15662.

The product of its digits is 564480, while the sum is 47.

The square root of 9872145722 is about 99358.6721026403. The cubic root of 9872145722 is about 2145.2134889290.

The spelling of 9872145722 in words is "nine billion, eight hundred seventy-two million, one hundred forty-five thousand, seven hundred twenty-two".