643385646314 has 8 divisors (see below), whose sum is σ = 974633702148. Its totient is φ = 318507745600.

The previous prime is 643385646311. The next prime is 643385646329. The reversal of 643385646314 is 413646583346.

It can be written as a sum of positive squares in 2 ways, for example, as 642775803289 + 609843025 = 801733^2 + 24695^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (643385646311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1592538527 + ... + 1592538930.

Almost surely, 2^643385646314 is an apocalyptic number.

643385646314 is a deficient number, since it is larger than the sum of its proper divisors (331248055834).

643385646314 is a wasteful number, since it uses less digits than its factorization.

643385646314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3185077560.

The product of its digits is 14929920, while the sum is 53.

The spelling of 643385646314 in words is "six hundred forty-three billion, three hundred eighty-five million, six hundred forty-six thousand, three hundred fourteen".