643106255241 has 8 divisors (see below), whose sum is σ = 857492913760. Its totient is φ = 428728550112.

The previous prime is 643106255237. The next prime is 643106255269. The reversal of 643106255241 is 142552601346.

643106255241 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 not a de Polignac number, because 643106255241 - 2² = 643106255237 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 643106255241.

It is not an unprimeable number, because it can be changed into a prime (643106255221) 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, 2068915 + ... + 2359368.

It is an arithmetic number, because the mean of its divisors is an integer number (107186614220).

Almost surely, 2^643106255241 is an apocalyptic number.

It is an amenable number.

643106255241 is a deficient number, since it is larger than the sum of its proper divisors (214386658519).

643106255241 is a wasteful number, since it uses less digits than its factorization.

643106255241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476695.

The product of its (nonzero) digits is 172800, while the sum is 39.

Adding to 643106255241 its reverse (142552601346), we get a palindrome (785658856587).

The spelling of 643106255241 in words is "six hundred forty-three billion, one hundred six million, two hundred fifty-five thousand, two hundred forty-one".