6540642017 has 16 divisors (see below), whose sum is σ = 8083729920. Its totient is φ = 5153343552.

The previous prime is 6540642013. The next prime is 6540642029. The reversal of 6540642017 is 7102460456.

It is not a de Polignac number, because 6540642017 - 2² = 6540642013 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6540642011) 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, 128618 + ... + 172115.

It is an arithmetic number, because the mean of its divisors is an integer number (505233120).

Almost surely, 2^6540642017 is an apocalyptic number.

It is an amenable number.

6540642017 is a deficient number, since it is larger than the sum of its proper divisors (1543087903).

6540642017 is a wasteful number, since it uses less digits than its factorization.

6540642017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300992.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 6540642017 is about 80874.2358047357. The cubic root of 6540642017 is about 1870.1371606715.

The spelling of 6540642017 in words is "six billion, five hundred forty million, six hundred forty-two thousand, seventeen".