6556551001212 has 48 divisors (see below), whose sum is σ = 15330162725024. Its totient is φ = 2181012480000.

The previous prime is 6556551001207. The next prime is 6556551001213. The reversal of 6556551001212 is 2121001556556.

It is a super-2 number, since 2×6556551001212² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6556551001213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31062912 + ... + 31273272.

Almost surely, 2^{6556551001212} is an apocalyptic number.

It is an amenable number.

6556551001212 is an abundant number, since it is smaller than the sum of its proper divisors (8773611723812).

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

6556551001212 is a wasteful number, since it uses less digits than its factorization.

6556551001212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215710 (or 215708 counting only the distinct ones).

The product of its (nonzero) digits is 90000, while the sum is 39.

Adding to 6556551001212 its reverse (2121001556556), we get a palindrome (8677552557768).

The spelling of 6556551001212 in words is "six trillion, five hundred fifty-six billion, five hundred fifty-one million, one thousand, two hundred twelve".