643064631462 has 48 divisors (see below), whose sum is σ = 1533915686160. Its totient is φ = 193080283200.

The previous prime is 643064631289. The next prime is 643064631491. The reversal of 643064631462 is 264136460346.

643064631462 is a `hidden beast` number, since 6 + 4 + 3 + 0 + 6 + 4 + 631 + 4 + 6 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 14876589 + ... + 14919752.

It is an arithmetic number, because the mean of its divisors is an integer number (31956576795).

Almost surely, 2^643064631462 is an apocalyptic number.

643064631462 is an abundant number, since it is smaller than the sum of its proper divisors (890851054698).

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

643064631462 is a wasteful number, since it uses less digits than its factorization.

643064631462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29796469 (or 29796466 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 45.

The spelling of 643064631462 in words is "six hundred forty-three billion, sixty-four million, six hundred thirty-one thousand, four hundred sixty-two".