6517645123 has 16 divisors (see below), whose sum is σ = 7207718400. Its totient is φ = 5843990880.

The previous prime is 6517645093. The next prime is 6517645151. The reversal of 6517645123 is 3215467156.

6517645123 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 6517645123 - 2²⁹ = 5980774211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6517645153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 960340 + ... + 967102.

It is an arithmetic number, because the mean of its divisors is an integer number (450482400).

Almost surely, 2^6517645123 is an apocalyptic number.

6517645123 is a deficient number, since it is larger than the sum of its proper divisors (690073277).

6517645123 is a wasteful number, since it uses less digits than its factorization.

6517645123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7962.

The product of its digits is 151200, while the sum is 40.

The square root of 6517645123 is about 80731.9337251375. The cubic root of 6517645123 is about 1867.9427864175.

The spelling of 6517645123 in words is "six billion, five hundred seventeen million, six hundred forty-five thousand, one hundred twenty-three".