643262663122 has 32 divisors (see below), whose sum is σ = 1033025385600. Its totient is φ = 299542313088.

The previous prime is 643262663117. The next prime is 643262663129. The reversal of 643262663122 is 221366262346.

It is not an unprimeable number, because it can be changed into a prime (643262663129) 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 15 ways as a sum of consecutive naturals, for example, 63597 + ... + 1136032.

It is an arithmetic number, because the mean of its divisors is an integer number (32282043300).

Almost surely, 2^643262663122 is an apocalyptic number.

643262663122 is a deficient number, since it is larger than the sum of its proper divisors (389762722478).

643262663122 is a wasteful number, since it uses less digits than its factorization.

643262663122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1199890.

The product of its digits is 746496, while the sum is 43.

The spelling of 643262663122 in words is "six hundred forty-three billion, two hundred sixty-two million, six hundred sixty-three thousand, one hundred twenty-two".