6642445462620 has 192 divisors, whose sum is σ = 20338669596672. Its totient is φ = 1606404096000.

The previous prime is 6642445462603. The next prime is 6642445462633. The reversal of 6642445462620 is 262645442466.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 530922165 + ... + 530934675.

It is an arithmetic number, because the mean of its divisors is an integer number (105930570816).

Almost surely, 2^{6642445462620} is an apocalyptic number.

6642445462620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6642445462620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10169334798336).

6642445462620 is an abundant number, since it is smaller than the sum of its proper divisors (13696224134052).

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

6642445462620 is a wasteful number, since it uses less digits than its factorization.

6642445462620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14412 (or 14410 counting only the distinct ones).

The product of its (nonzero) digits is 13271040, while the sum is 51.

The spelling of 6642445462620 in words is "six trillion, six hundred forty-two billion, four hundred forty-five million, four hundred sixty-two thousand, six hundred twenty".