643175244464 has 40 divisors (see below), whose sum is σ = 1311829065840. Its totient is φ = 304641036288.

The previous prime is 643175244379. The next prime is 643175244493. The reversal of 643175244464 is 464442571346.

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 7 ways as a sum of consecutive naturals, for example, 4926332 + ... + 5055204.

It is an arithmetic number, because the mean of its divisors is an integer number (32795726646).

Almost surely, 2^643175244464 is an apocalyptic number.

It is an amenable number.

643175244464 is an abundant number, since it is smaller than the sum of its proper divisors (668653821376).

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

643175244464 is a wasteful number, since it uses less digits than its factorization.

643175244464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145317 (or 145311 counting only the distinct ones).

The product of its digits is 7741440, while the sum is 50.

The spelling of 643175244464 in words is "six hundred forty-three billion, one hundred seventy-five million, two hundred forty-four thousand, four hundred sixty-four".