643103340542 has 32 divisors (see below), whose sum is σ = 1071516019392. Its totient is φ = 287555284224.

The previous prime is 643103340527. The next prime is 643103340547. The reversal of 643103340542 is 245043301346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643103340547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1210418 + ... + 1658709.

It is an arithmetic number, because the mean of its divisors is an integer number (33484875606).

Almost surely, 2^643103340542 is an apocalyptic number.

643103340542 is a deficient number, since it is larger than the sum of its proper divisors (428412678850).

643103340542 is a wasteful number, since it uses less digits than its factorization.

643103340542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2869412.

The product of its (nonzero) digits is 103680, while the sum is 35.

Adding to 643103340542 its reverse (245043301346), we get a palindrome (888146641888).

The spelling of 643103340542 in words is "six hundred forty-three billion, one hundred three million, three hundred forty thousand, five hundred forty-two".