6442642031331 has 32 divisors (see below), whose sum is σ = 9809655054336. Its totient is φ = 3725454852000.

The previous prime is 6442642031311. The next prime is 6442642031339. The reversal of 6442642031331 is 1331302462446.

6442642031331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6442642031331 - 2¹⁷ = 6442641900259 is a prime.

It is a super-2 number, since 2×6442642031331² (a number of 26 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6442642031331.

It is not an unprimeable number, because it can be changed into a prime (6442642031339) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 44278021 + ... + 44423286.

It is an arithmetic number, because the mean of its divisors is an integer number (306551720448).

Almost surely, 2^{6442642031331} is an apocalyptic number.

6442642031331 is a deficient number, since it is larger than the sum of its proper divisors (3367013023005).

6442642031331 is a wasteful number, since it uses less digits than its factorization.

6442642031331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88701423.

The product of its (nonzero) digits is 248832, while the sum is 39.

Adding to 6442642031331 its reverse (1331302462446), we get a palindrome (7773944493777).

The spelling of 6442642031331 in words is "six trillion, four hundred forty-two billion, six hundred forty-two million, thirty-one thousand, three hundred thirty-one".