6642943037813 has 8 divisors (see below), whose sum is σ = 6800725100928. Its totient is φ = 6485310748224.

The previous prime is 6642943037789. The next prime is 6642943037831. The reversal of 6642943037813 is 3187303492466.

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

It is a cyclic number.

It is not a de Polignac number, because 6642943037813 - 2⁴² = 2244896526709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6642943037713) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 37353620 + ... + 37531037.

It is an arithmetic number, because the mean of its divisors is an integer number (850090637616).

Almost surely, 2^{6642943037813} is an apocalyptic number.

It is an amenable number.

6642943037813 is a deficient number, since it is larger than the sum of its proper divisors (157782063115).

6642943037813 is a wasteful number, since it uses less digits than its factorization.

6642943037813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74886763.

The product of its (nonzero) digits is 15676416, while the sum is 56.

The spelling of 6642943037813 in words is "six trillion, six hundred forty-two billion, nine hundred forty-three million, thirty-seven thousand, eight hundred thirteen".