6718538143 has 4 divisors (see below), whose sum is σ = 6750379768. Its totient is φ = 6686696520.

The previous prime is 6718538131. The next prime is 6718538161. The reversal of 6718538143 is 3418358176.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6718538143 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6718538093 and 6718538102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6718518143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15920496 + ... + 15920917.

It is an arithmetic number, because the mean of its divisors is an integer number (1687594942).

Almost surely, 2^6718538143 is an apocalyptic number.

6718538143 is a deficient number, since it is larger than the sum of its proper divisors (31841625).

6718538143 is a wasteful number, since it uses less digits than its factorization.

6718538143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31841624.

The product of its digits is 483840, while the sum is 46.

The square root of 6718538143 is about 81966.6892280029. The cubic root of 6718538143 is about 1886.9407450210.

The spelling of 6718538143 in words is "six billion, seven hundred eighteen million, five hundred thirty-eight thousand, one hundred forty-three".