6381218165 has 8 divisors (see below), whose sum is σ = 8751384960. Its totient is φ = 4375692432.

The previous prime is 6381218149. The next prime is 6381218167. The reversal of 6381218165 is 5618121836.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6381218165 - 2⁴ = 6381218149 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6381218167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91160225 + ... + 91160294.

It is an arithmetic number, because the mean of its divisors is an integer number (1093923120).

Almost surely, 2^6381218165 is an apocalyptic number.

It is an amenable number.

6381218165 is a deficient number, since it is larger than the sum of its proper divisors (2370166795).

6381218165 is a wasteful number, since it uses less digits than its factorization.

6381218165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182320531.

The product of its digits is 69120, while the sum is 41.

The square root of 6381218165 is about 79882.5272822537. The cubic root of 6381218165 is about 1854.8175548243.

The spelling of 6381218165 in words is "six billion, three hundred eighty-one million, two hundred eighteen thousand, one hundred sixty-five".