6551560655500 has 144 divisors (see below), whose sum is σ = 16723605880800. Its totient is φ = 2235601872000.

The previous prime is 6551560655491. The next prime is 6551560655501. The reversal of 6551560655500 is 55560651556.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (6551560655501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4535826 + ... + 5803174.

It is an arithmetic number, because the mean of its divisors is an integer number (116136151950).

Almost surely, 2^{6551560655500} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6551560655500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8361802940400).

6551560655500 is an abundant number, since it is smaller than the sum of its proper divisors (10172045225300).

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

6551560655500 is a wasteful number, since it uses less digits than its factorization.

6551560655500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267593 (or 1267574 counting only the distinct ones).

The product of its (nonzero) digits is 3375000, while the sum is 49.

The spelling of 6551560655500 in words is "six trillion, five hundred fifty-one billion, five hundred sixty million, six hundred fifty-five thousand, five hundred".