6642451892736 has 160 divisors (see below), whose sum is σ = 21449584728000. Its totient is φ = 2012864163840.

The previous prime is 6642451892683. The next prime is 6642451892773. The reversal of 6642451892736 is 6372981542466.

6642451892736 is a `hidden beast` number, since 6 + 6 + 4 + 24 + 518 + 92 + 7 + 3 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21688911 + ... + 21993038.

It is an arithmetic number, because the mean of its divisors is an integer number (134059904550).

Almost surely, 2^{6642451892736} is an apocalyptic number.

6642451892736 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

6642451892736 is an abundant number, since it is smaller than the sum of its proper divisors (14807132835264).

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

6642451892736 is a wasteful number, since it uses less digits than its factorization.

6642451892736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43681987 (or 43681965 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 63.

The spelling of 6642451892736 in words is "six trillion, six hundred forty-two billion, four hundred fifty-one million, eight hundred ninety-two thousand, seven hundred thirty-six".