643255346143 has 8 divisors (see below), whose sum is σ = 644903439840. Its totient is φ = 641608084320.

The previous prime is 643255346077. The next prime is 643255346161. The reversal of 643255346143 is 341643552346.

643255346143 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 643255346143 - 2¹³ = 643255337951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643255346093 and 643255346102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643255346443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1355553 + ... + 1767493.

It is an arithmetic number, because the mean of its divisors is an integer number (80612929980).

Almost surely, 2^643255346143 is an apocalyptic number.

643255346143 is a deficient number, since it is larger than the sum of its proper divisors (1648093697).

643255346143 is a wasteful number, since it uses less digits than its factorization.

643255346143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415937.

The product of its digits is 3110400, while the sum is 46.

Adding to 643255346143 its reverse (341643552346), we get a palindrome (984898898489).

The spelling of 643255346143 in words is "six hundred forty-three billion, two hundred fifty-five million, three hundred forty-six thousand, one hundred forty-three".