643062604123 has 8 divisors (see below), whose sum is σ = 676939579920. Its totient is φ = 609188785920.

The previous prime is 643062604109. The next prime is 643062604139. The reversal of 643062604123 is 321406260346.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 643062604123 - 2⁹ = 643062603611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643062604103) 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 7 ways as a sum of consecutive naturals, for example, 365518 + ... + 1191523.

It is an arithmetic number, because the mean of its divisors is an integer number (84617447490).

Almost surely, 2^643062604123 is an apocalyptic number.

643062604123 is a deficient number, since it is larger than the sum of its proper divisors (33876975797).

643062604123 is a wasteful number, since it uses less digits than its factorization.

643062604123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1578797.

The product of its (nonzero) digits is 124416, while the sum is 37.

Adding to 643062604123 its reverse (321406260346), we get a palindrome (964468864469).

The spelling of 643062604123 in words is "six hundred forty-three billion, sixty-two million, six hundred four thousand, one hundred twenty-three".