643312211234 has 128 divisors (see below), whose sum is σ = 1265388355584. Its totient is φ = 238008960000.

The previous prime is 643312211207. The next prime is 643312211281. The reversal of 643312211234 is 432112213346.

It is a super-2 number, since 2×643312211234² (a number of 24 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 643312211234.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 54479759 + ... + 54491565.

It is an arithmetic number, because the mean of its divisors is an integer number (9885846528).

Almost surely, 2^643312211234 is an apocalyptic number.

643312211234 is a deficient number, since it is larger than the sum of its proper divisors (622076144350).

643312211234 is a wasteful number, since it uses less digits than its factorization.

643312211234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12072.

The product of its digits is 20736, while the sum is 32.

The spelling of 643312211234 in words is "six hundred forty-three billion, three hundred twelve million, two hundred eleven thousand, two hundred thirty-four".