643614424412 has 36 divisors (see below), whose sum is σ = 1177928794056. Its totient is φ = 307683905760.

The previous prime is 643614424309. The next prime is 643614424463. The reversal of 643614424412 is 214424416346.

It is a super-2 number, since 2×643614424412² (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 643614424412.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4974323 + ... + 5102069.

Almost surely, 2^643614424412 is an apocalyptic number.

It is an amenable number.

643614424412 is a deficient number, since it is larger than the sum of its proper divisors (534314369644).

643614424412 is a wasteful number, since it uses less digits than its factorization.

643614424412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130178 (or 130153 counting only the distinct ones).

The product of its digits is 442368, while the sum is 41.

The spelling of 643614424412 in words is "six hundred forty-three billion, six hundred fourteen million, four hundred twenty-four thousand, four hundred twelve".