6556513212 has 36 divisors (see below), whose sum is σ = 16619606640. Its totient is φ = 2179412352.

The previous prime is 6556513181. The next prime is 6556513231. The reversal of 6556513212 is 2123156556.

6556513212 is a `hidden beast` number, since 65 + 565 + 1 + 32 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240733 + ... + 266580.

It is an arithmetic number, because the mean of its divisors is an integer number (461655740).

Almost surely, 2^6556513212 is an apocalyptic number.

It is an amenable number.

6556513212 is an abundant number, since it is smaller than the sum of its proper divisors (10063093428).

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

6556513212 is a wasteful number, since it uses less digits than its factorization.

6556513212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 507682 (or 507677 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 6556513212 is about 80972.2990410918. The cubic root of 6556513212 is about 1871.6485992560.

Adding to 6556513212 its reverse (2123156556), we get a palindrome (8679669768).

The spelling of 6556513212 in words is "six billion, five hundred fifty-six million, five hundred thirteen thousand, two hundred twelve".