6381338518 has 24 divisors (see below), whose sum is σ = 10696587192. Its totient is φ = 2844925632.

The previous prime is 6381338449. The next prime is 6381338521. The reversal of 6381338518 is 8158331836.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247680 + ... + 272227.

It is an arithmetic number, because the mean of its divisors is an integer number (445691133).

Almost surely, 2^6381338518 is an apocalyptic number.

6381338518 is a deficient number, since it is larger than the sum of its proper divisors (4315248674).

6381338518 is a wasteful number, since it uses less digits than its factorization.

6381338518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519964 (or 519945 counting only the distinct ones).

The product of its digits is 414720, while the sum is 46.

The square root of 6381338518 is about 79883.2805911224. The cubic root of 6381338518 is about 1854.8292156832.

The spelling of 6381338518 in words is "six billion, three hundred eighty-one million, three hundred thirty-eight thousand, five hundred eighteen".