6544331442 has 128 divisors (see below), whose sum is σ = 16282886400. Its totient is φ = 1931558400.

The previous prime is 6544331413. The next prime is 6544331447. The reversal of 6544331442 is 2441334456.

It is a junction number, because it is equal to n+sod(n) for n = 6544331397 and 6544331406.

It is not an unprimeable number, because it can be changed into a prime (6544331447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3948678 + ... + 3950334.

It is an arithmetic number, because the mean of its divisors is an integer number (127210050).

Almost surely, 2^6544331442 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6544331442, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8141443200).

6544331442 is an abundant number, since it is smaller than the sum of its proper divisors (9738554958).

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

6544331442 is a wasteful number, since it uses less digits than its factorization.

6544331442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1849 (or 1843 counting only the distinct ones).

The product of its digits is 138240, while the sum is 36.

The square root of 6544331442 is about 80897.0422327047. The cubic root of 6544331442 is about 1870.4887282931.

Adding to 6544331442 its reverse (2441334456), we get a palindrome (8985665898).

It can be divided in two parts, 654 and 4331442, that added together give a triangular number (4332096 = T₂₉₄₃).

The spelling of 6544331442 in words is "six billion, five hundred forty-four million, three hundred thirty-one thousand, four hundred forty-two".