12209213646 has 192 divisors, whose sum is σ = 33411816960. Its totient is φ = 3236060160.

The previous prime is 12209213633. The next prime is 12209213677. The reversal of 12209213646 is 64631290221.

It is a happy number.

12209213646 is a `hidden beast` number, since 1 + 2 + 2 + 0 + 9 + 2 + 1 + 3 + 646 = 666.

It is a super-2 number, since 2×12209213646² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 12209213646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7973901 + ... + 7975431.

It is an arithmetic number, because the mean of its divisors is an integer number (174019880).

Almost surely, 2^12209213646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12209213646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16705908480).

12209213646 is an abundant number, since it is smaller than the sum of its proper divisors (21202603314).

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

12209213646 is a wasteful number, since it uses less digits than its factorization.

12209213646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1656 (or 1633 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The spelling of 12209213646 in words is "twelve billion, two hundred nine million, two hundred thirteen thousand, six hundred forty-six".