12206556643 has 8 divisors (see below), whose sum is σ = 12413973600. Its totient is φ = 12000125760.

The previous prime is 12206556641. The next prime is 12206556667. The reversal of 12206556643 is 34665560221.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12206556643 - 2¹ = 12206556641 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12206556596 and 12206556605.

It is not an unprimeable number, because it can be changed into a prime (12206556641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221530 + ... + 271087.

It is an arithmetic number, because the mean of its divisors is an integer number (1551746700).

Almost surely, 2^12206556643 is an apocalyptic number.

12206556643 is a deficient number, since it is larger than the sum of its proper divisors (207416957).

12206556643 is an equidigital number, since it uses as much as digits as its factorization.

12206556643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493037.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 12206556643 in words is "twelve billion, two hundred six million, five hundred fifty-six thousand, six hundred forty-three".