643415939473 has 8 divisors (see below), whose sum is σ = 647241032000. Its totient is φ = 639596765808.

The previous prime is 643415939461. The next prime is 643415939503. The reversal of 643415939473 is 374939514346.

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

It is a cyclic number.

It is not a de Polignac number, because 643415939473 - 2⁹ = 643415938961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643415939423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1261563 + ... + 1696576.

It is an arithmetic number, because the mean of its divisors is an integer number (80905129000).

Almost surely, 2^643415939473 is an apocalyptic number.

It is an amenable number.

643415939473 is a deficient number, since it is larger than the sum of its proper divisors (3825092527).

643415939473 is a wasteful number, since it uses less digits than its factorization.

643415939473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2959431.

The product of its digits is 29393280, while the sum is 58.

The spelling of 643415939473 in words is "six hundred forty-three billion, four hundred fifteen million, nine hundred thirty-nine thousand, four hundred seventy-three".