643212424212347 has 32 divisors (see below), whose sum is σ = 733070362752000. Its totient is φ = 559011573111040.

The previous prime is 643212424212343. The next prime is 643212424212349. The reversal of 643212424212347 is 743212424212346.

It is not a de Polignac number, because 643212424212347 - 2² = 643212424212343 is a prime.

It is a super-3 number, since 3×643212424212347³ (a number of 45 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643212424212343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10868147 + ... + 37477212.

It is an arithmetic number, because the mean of its divisors is an integer number (22908448836000).

Almost surely, 2^{643212424212347} is an apocalyptic number.

643212424212347 is a deficient number, since it is larger than the sum of its proper divisors (89857938539653).

643212424212347 is a wasteful number, since it uses less digits than its factorization.

643212424212347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48345811.

The product of its digits is 3096576, while the sum is 47.

Subtracting 643212424212347 from its reverse (743212424212346), we obtain a palindrome (99999999999999).

The spelling of 643212424212347 in words is "six hundred forty-three trillion, two hundred twelve billion, four hundred twenty-four million, two hundred twelve thousand, three hundred forty-seven".