643063552036 has 6 divisors (see below), whose sum is σ = 1125361216070. Its totient is φ = 321531776016.

The previous prime is 643063552031. The next prime is 643063552049. The reversal of 643063552036 is 630255360346.

It can be written as a sum of positive squares in only one way, i.e., 495607552036 + 147456000000 = 703994^2 + 384000^2 .

It is a junction number, because it is equal to n+sod(n) for n = 643063551983 and 643063552001.

It is not an unprimeable number, because it can be changed into a prime (643063552031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80382944001 + ... + 80382944008.

Almost surely, 2^643063552036 is an apocalyptic number.

It is an amenable number.

643063552036 is a deficient number, since it is larger than the sum of its proper divisors (482297664034).

643063552036 is a wasteful number, since it uses less digits than its factorization.

643063552036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160765888013 (or 160765888011 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 43.

The spelling of 643063552036 in words is "six hundred forty-three billion, sixty-three million, five hundred fifty-two thousand, thirty-six".