12606445220 has 12 divisors (see below), whose sum is σ = 26473535004. Its totient is φ = 5042578080.

The previous prime is 12606445219. The next prime is 12606445259. The reversal of 12606445220 is 2254460621.

It can be written as a sum of positive squares in 2 ways, for example, as 10042845796 + 2563599424 = 100214^2 + 50632^2 .

It is a super-2 number, since 2×12606445220² (a number of 21 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

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 3 ways as a sum of consecutive naturals, for example, 315161111 + ... + 315161150.

It is an arithmetic number, because the mean of its divisors is an integer number (2206127917).

Almost surely, 2^12606445220 is an apocalyptic number.

12606445220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12606445220 is an abundant number, since it is smaller than the sum of its proper divisors (13867089784).

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

12606445220 is a wasteful number, since it uses less digits than its factorization.

12606445220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 630322270 (or 630322268 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 12606445220 in words is "twelve billion, six hundred six million, four hundred forty-five thousand, two hundred twenty".