6418491311 has 4 divisors (see below), whose sum is σ = 6422557800. Its totient is φ = 6414424824.

The previous prime is 6418491301. The next prime is 6418491337. The reversal of 6418491311 is 1131948146.

It is a happy number.

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-6418491311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6418491301) 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, 2030876 + ... + 2034033.

It is an arithmetic number, because the mean of its divisors is an integer number (1605639450).

Almost surely, 2^6418491311 is an apocalyptic number.

6418491311 is a deficient number, since it is larger than the sum of its proper divisors (4066489).

6418491311 is a wasteful number, since it uses less digits than its factorization.

6418491311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4066488.

The product of its digits is 20736, while the sum is 38.

The square root of 6418491311 is about 80115.4873354709. The cubic root of 6418491311 is about 1858.4219195711.

The spelling of 6418491311 in words is "six billion, four hundred eighteen million, four hundred ninety-one thousand, three hundred eleven".