3218378238646 has 8 divisors (see below), whose sum is σ = 4828538909880. Its totient is φ = 1608865268688.

The previous prime is 3218378238613. The next prime is 3218378238661. The reversal of 3218378238646 is 6468328738123.

It is a happy number.

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

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 161912896 + ... + 161932771.

It is an arithmetic number, because the mean of its divisors is an integer number (603567363735).

Almost surely, 2^{3218378238646} is an apocalyptic number.

3218378238646 is a deficient number, since it is larger than the sum of its proper divisors (1610160671234).

3218378238646 is a wasteful number, since it uses less digits than its factorization.

3218378238646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323850638.

The product of its digits is 55738368, while the sum is 61.

The spelling of 3218378238646 in words is "three trillion, two hundred eighteen billion, three hundred seventy-eight million, two hundred thirty-eight thousand, six hundred forty-six".