6641563188556 has 24 divisors (see below), whose sum is σ = 11691199059120. Its totient is φ = 3301231813632.

The previous prime is 6641563188541. The next prime is 6641563188607. The reversal of 6641563188556 is 6558813651466.

It is a super-2 number, since 2×6641563188556² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

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, 972180 + ... + 3772036.

It is an arithmetic number, because the mean of its divisors is an integer number (487133294130).

Almost surely, 2^{6641563188556} is an apocalyptic number.

It is an amenable number.

6641563188556 is a deficient number, since it is larger than the sum of its proper divisors (5049635870564).

6641563188556 is a wasteful number, since it uses less digits than its factorization.

6641563188556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2803353 (or 2803351 counting only the distinct ones).

The product of its digits is 124416000, while the sum is 64.

The spelling of 6641563188556 in words is "six trillion, six hundred forty-one billion, five hundred sixty-three million, one hundred eighty-eight thousand, five hundred fifty-six".