643232702749 has 8 divisors (see below), whose sum is σ = 791671018880. Its totient is φ = 508931369136.

The previous prime is 643232702747. The next prime is 643232702779. The reversal of 643232702749 is 947207232346.

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 643232702749 - 2¹ = 643232702747 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643232702747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534245529 + ... + 3534245710.

It is an arithmetic number, because the mean of its divisors is an integer number (98958877360).

Almost surely, 2^643232702749 is an apocalyptic number.

It is an amenable number.

643232702749 is a deficient number, since it is larger than the sum of its proper divisors (148438316131).

643232702749 is a wasteful number, since it uses less digits than its factorization.

643232702749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7068491259.

The product of its (nonzero) digits is 3048192, while the sum is 49.

The spelling of 643232702749 in words is "six hundred forty-three billion, two hundred thirty-two million, seven hundred two thousand, seven hundred forty-nine".