8641128723 has 8 divisors (see below), whose sum is σ = 11521934736. Its totient is φ = 5760537600.

The previous prime is 8641128721. The next prime is 8641128737. The reversal of 8641128723 is 3278211468.

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

It is not a de Polignac number, because 8641128723 - 2¹ = 8641128721 is a prime.

It is a super-2 number, since 2×8641128723² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8641128721) 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, 126043 + ... + 182123.

It is an arithmetic number, because the mean of its divisors is an integer number (1440241842).

Almost surely, 2^8641128723 is an apocalyptic number.

8641128723 is a deficient number, since it is larger than the sum of its proper divisors (2880806013).

8641128723 is a wasteful number, since it uses less digits than its factorization.

8641128723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107445.

The product of its digits is 129024, while the sum is 42.

The square root of 8641128723 is about 92957.6716737247. The cubic root of 8641128723 is about 2052.0604881018.

The spelling of 8641128723 in words is "eight billion, six hundred forty-one million, one hundred twenty-eight thousand, seven hundred twenty-three".