643255426126 has 16 divisors (see below), whose sum is σ = 1022296373280. Its totient is φ = 302514242560.

The previous prime is 643255426123. The next prime is 643255426127. The reversal of 643255426126 is 621624552346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643255426123) 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, 6014755 + ... + 6120766.

It is an arithmetic number, because the mean of its divisors is an integer number (63893523330).

Almost surely, 2^643255426126 is an apocalyptic number.

643255426126 is a deficient number, since it is larger than the sum of its proper divisors (379040947154).

643255426126 is a wasteful number, since it uses less digits than its factorization.

643255426126 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12137099.

The product of its digits is 2073600, while the sum is 46.

The spelling of 643255426126 in words is "six hundred forty-three billion, two hundred fifty-five million, four hundred twenty-six thousand, one hundred twenty-six".