6438154618 has 32 divisors (see below), whose sum is σ = 11784554496. Its totient is φ = 2577860208.

The previous prime is 6438154607. The next prime is 6438154669. The reversal of 6438154618 is 8164518346.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218646 + ... + 246337.

It is an arithmetic number, because the mean of its divisors is an integer number (368267328).

Almost surely, 2^6438154618 is an apocalyptic number.

6438154618 is a deficient number, since it is larger than the sum of its proper divisors (5346399878).

6438154618 is a wasteful number, since it uses less digits than its factorization.

6438154618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465058.

The product of its digits is 552960, while the sum is 46.

The square root of 6438154618 is about 80238.1120042091. The cubic root of 6438154618 is about 1860.3177683853.

The spelling of 6438154618 in words is "six billion, four hundred thirty-eight million, one hundred fifty-four thousand, six hundred eighteen".