643143511126 has 16 divisors (see below), whose sum is σ = 968810673600. Its totient is φ = 320206784128.

The previous prime is 643143511123. The next prime is 643143511133. The reversal of 643143511126 is 621115341346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643143511121) 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, 10854036 + ... + 10913128.

It is an arithmetic number, because the mean of its divisors is an integer number (60550667100).

Almost surely, 2^643143511126 is an apocalyptic number.

643143511126 is a deficient number, since it is larger than the sum of its proper divisors (325667162474).

643143511126 is a wasteful number, since it uses less digits than its factorization.

643143511126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82103.

The product of its digits is 51840, while the sum is 37.

The spelling of 643143511126 in words is "six hundred forty-three billion, one hundred forty-three million, five hundred eleven thousand, one hundred twenty-six".