643300134142 has 16 divisors (see below), whose sum is σ = 970989120000. Its totient is φ = 319639495000.

The previous prime is 643300134119. The next prime is 643300134151. The reversal of 643300134142 is 241431003346.

It is a congruent number.

It is an unprimeable number.

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, 62734 + ... + 1136017.

It is an arithmetic number, because the mean of its divisors is an integer number (60686820000).

Almost surely, 2^643300134142 is an apocalyptic number.

643300134142 is a deficient number, since it is larger than the sum of its proper divisors (327688985858).

643300134142 is a wasteful number, since it uses less digits than its factorization.

643300134142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200431.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 643300134142 its reverse (241431003346), we get a palindrome (884731137488).

The spelling of 643300134142 in words is "six hundred forty-three billion, three hundred million, one hundred thirty-four thousand, one hundred forty-two".