643082280347 has 8 divisors (see below), whose sum is σ = 709441615680. Its totient is φ = 579136011840.

The previous prime is 643082280341. The next prime is 643082280349. The reversal of 643082280347 is 743082280346.

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 643082280347 - 2⁸ = 643082280091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643082280341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603266147 + ... + 603267212.

It is an arithmetic number, because the mean of its divisors is an integer number (88680201960).

Almost surely, 2^643082280347 is an apocalyptic number.

643082280347 is a deficient number, since it is larger than the sum of its proper divisors (66359335333).

643082280347 is a wasteful number, since it uses less digits than its factorization.

643082280347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206533413.

The product of its (nonzero) digits is 1548288, while the sum is 47.

Subtracting 643082280347 from its reverse (743082280346), we obtain a palindrome (99999999999).

The spelling of 643082280347 in words is "six hundred forty-three billion, eighty-two million, two hundred eighty thousand, three hundred forty-seven".