6718946846537 has 2 divisors, whose sum is σ = 6718946846538. Its totient is φ = 6718946846536.

The previous prime is 6718946846533. The next prime is 6718946846587. The reversal of 6718946846537 is 7356486498176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3627763999561 + 3091182846976 = 1904669^2 + 1758176^2 .

It is a cyclic number.

It is not a de Polignac number, because 6718946846537 - 2² = 6718946846533 is a prime.

It is not a weakly prime, because it can be changed into another prime (6718946846533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3359473423268 + 3359473423269.

It is an arithmetic number, because the mean of its divisors is an integer number (3359473423269).

Almost surely, 2^{6718946846537} is an apocalyptic number.

It is an amenable number.

6718946846537 is a deficient number, since it is larger than the sum of its proper divisors (1).

6718946846537 is an equidigital number, since it uses as much as digits as its factorization.

6718946846537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1463132160, while the sum is 74.

The spelling of 6718946846537 in words is "six trillion, seven hundred eighteen billion, nine hundred forty-six million, eight hundred forty-six thousand, five hundred thirty-seven".