643119416 has 8 divisors (see below), whose sum is σ = 1205848920. Its totient is φ = 321559704.

The previous prime is 643119343. The next prime is 643119431. The reversal of 643119416 is 614911346.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40194956 + ... + 40194971.

It is an arithmetic number, because the mean of its divisors is an integer number (150731115).

Almost surely, 2^643119416 is an apocalyptic number.

It is an amenable number.

643119416 is a deficient number, since it is larger than the sum of its proper divisors (562729504).

643119416 is a wasteful number, since it uses less digits than its factorization.

643119416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80389933 (or 80389929 counting only the distinct ones).

The product of its digits is 15552, while the sum is 35.

The square root of 643119416 is about 25359.7992105616. The cubic root of 643119416 is about 863.1717278083.

The spelling of 643119416 in words is "six hundred forty-three million, one hundred nineteen thousand, four hundred sixteen".