6430501643 has 4 divisors (see below), whose sum is σ = 6433940448. Its totient is φ = 6427062840.

The previous prime is 6430501631. The next prime is 6430501661. The reversal of 6430501643 is 3461050346.

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 6430501643 - 2⁶ = 6430501579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6430501663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1716596 + ... + 1720337.

It is an arithmetic number, because the mean of its divisors is an integer number (1608485112).

Almost surely, 2^6430501643 is an apocalyptic number.

6430501643 is a deficient number, since it is larger than the sum of its proper divisors (3438805).

6430501643 is a wasteful number, since it uses less digits than its factorization.

6430501643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3438804.

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 6430501643 is about 80190.4086721099. The cubic root of 6430501643 is about 1859.5803619356.

Adding to 6430501643 its reverse (3461050346), we get a palindrome (9891551989).

The spelling of 6430501643 in words is "six billion, four hundred thirty million, five hundred one thousand, six hundred forty-three".