6638816212716 has 48 divisors (see below), whose sum is σ = 16402007351520. Its totient is φ = 2082737157120.

The previous prime is 6638816212667. The next prime is 6638816212747. The reversal of 6638816212716 is 6172126188366.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 18382926 + ... + 18740586.

It is an arithmetic number, because the mean of its divisors is an integer number (341708486490).

Almost surely, 2^{6638816212716} is an apocalyptic number.

It is an amenable number.

6638816212716 is an abundant number, since it is smaller than the sum of its proper divisors (9763191138804).

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

6638816212716 is a wasteful number, since it uses less digits than its factorization.

6638816212716 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 448674 (or 448672 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 57.

The spelling of 6638816212716 in words is "six trillion, six hundred thirty-eight billion, eight hundred sixteen million, two hundred twelve thousand, seven hundred sixteen".