643266012212 has 48 divisors (see below), whose sum is σ = 1193231692800. Its totient is φ = 302893059840.

The previous prime is 643266012211. The next prime is 643266012251. The reversal of 643266012212 is 212210662346.

It is a super-3 number, since 3×643266012212³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643266012211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22353089 + ... + 22381847.

It is an arithmetic number, because the mean of its divisors is an integer number (24858993600).

Almost surely, 2^643266012212 is an apocalyptic number.

It is an amenable number.

643266012212 is a deficient number, since it is larger than the sum of its proper divisors (549965680588).

643266012212 is a wasteful number, since it uses less digits than its factorization.

643266012212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33536 (or 33534 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 35.

Adding to 643266012212 its reverse (212210662346), we get a palindrome (855476674558).

The spelling of 643266012212 in words is "six hundred forty-three billion, two hundred sixty-six million, twelve thousand, two hundred twelve".