6421218323316 has 24 divisors (see below), whose sum is σ = 14987287477344. Its totient is φ = 2139771147360.

The previous prime is 6421218323309. The next prime is 6421218323347. The reversal of 6421218323316 is 6133238121246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79327915 + ... + 79408818.

It is an arithmetic number, because the mean of its divisors is an integer number (624470311556).

Almost surely, 2^{6421218323316} is an apocalyptic number.

It is an amenable number.

6421218323316 is an abundant number, since it is smaller than the sum of its proper divisors (8566069154028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6421218323316 is a wasteful number, since it uses less digits than its factorization.

6421218323316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158740111 (or 158740109 counting only the distinct ones).

The product of its digits is 248832, while the sum is 42.

The spelling of 6421218323316 in words is "six trillion, four hundred twenty-one billion, two hundred eighteen million, three hundred twenty-three thousand, three hundred sixteen".