6428519943 has 4 divisors (see below), whose sum is σ = 8571359928. Its totient is φ = 4285679960.

The previous prime is 6428519899. The next prime is 6428519969. The reversal of 6428519943 is 3499158246.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6428519943 - 2⁹ = 6428519431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428519443) 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, 1071419988 + ... + 1071419993.

It is an arithmetic number, because the mean of its divisors is an integer number (2142839982).

Almost surely, 2^6428519943 is an apocalyptic number.

6428519943 is a deficient number, since it is larger than the sum of its proper divisors (2142839985).

6428519943 is a wasteful number, since it uses less digits than its factorization.

6428519943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142839984.

The product of its digits is 1866240, while the sum is 51.

The square root of 6428519943 is about 80178.0515041367. The cubic root of 6428519943 is about 1859.3893188297.

The spelling of 6428519943 in words is "six billion, four hundred twenty-eight million, five hundred nineteen thousand, nine hundred forty-three".