643431422632002 has 32 divisors (see below), whose sum is σ = 1323697890816000. Its totient is φ = 208403626237008.

The previous prime is 643431422631961. The next prime is 643431422632007. The reversal of 643431422632002 is 200236224134346.

It is a super-2 number, since 2×643431422632002² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (643431422632007) 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, 8207413002 + ... + 8207491397.

It is an arithmetic number, because the mean of its divisors is an integer number (41365559088000).

Almost surely, 2^{643431422632002} is an apocalyptic number.

643431422632002 is an abundant number, since it is smaller than the sum of its proper divisors (680266468183998).

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

643431422632002 is a wasteful number, since it uses less digits than its factorization.

643431422632002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16414904590.

The product of its (nonzero) digits is 995328, while the sum is 42.

Adding to 643431422632002 its reverse (200236224134346), we get a palindrome (843667646766348).

The spelling of 643431422632002 in words is "six hundred forty-three trillion, four hundred thirty-one billion, four hundred twenty-two million, six hundred thirty-two thousand, two".