643347764466382 has 64 divisors (see below), whose sum is σ = 984584927232000. Its totient is φ = 315227418105600.

The previous prime is 643347764466349. The next prime is 643347764466397. The reversal of 643347764466382 is 283664467743346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 31408853913 + ... + 31408874395.

It is an arithmetic number, because the mean of its divisors is an integer number (15384139488000).

Almost surely, 2^{643347764466382} is an apocalyptic number.

643347764466382 is a deficient number, since it is larger than the sum of its proper divisors (341237162765618).

643347764466382 is a wasteful number, since it uses less digits than its factorization.

643347764466382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23281.

The product of its digits is 7023034368, while the sum is 73.

The spelling of 643347764466382 in words is "six hundred forty-three trillion, three hundred forty-seven billion, seven hundred sixty-four million, four hundred sixty-six thousand, three hundred eighty-two".