6644198645760 has 224 divisors, whose sum is σ = 22895538704640. Its totient is φ = 1635494658048.

The previous prime is 6644198645731. The next prime is 6644198645783. The reversal of 6644198645760 is 675468914466.

It is a junction number, because it is equal to n+sod(n) for n = 6644198645691 and 6644198645700.

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, 482200 + ... + 3677079.

It is an arithmetic number, because the mean of its divisors is an integer number (102212226360).

Almost surely, 2^{6644198645760} is an apocalyptic number.

6644198645760 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 6644198645760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11447769352320).

6644198645760 is an abundant number, since it is smaller than the sum of its proper divisors (16251340058880).

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

6644198645760 is a wasteful number, since it uses less digits than its factorization.

6644198645760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159326 (or 4159302 counting only the distinct ones).

The product of its (nonzero) digits is 209018880, while the sum is 66.

It can be divided in two parts, 66441986 and 45760, that added together give a triangular number (66487746 = T₁₁₅₃₁).

The spelling of 6644198645760 in words is "six trillion, six hundred forty-four billion, one hundred ninety-eight million, six hundred forty-five thousand, seven hundred sixty".