643663060 has 24 divisors (see below), whose sum is σ = 1352171520. Its totient is φ = 257373984.

The previous prime is 643663003. The next prime is 643663099. The reversal of 643663060 is 60366346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99237 + ... + 105523.

It is an arithmetic number, because the mean of its divisors is an integer number (56340480).

Almost surely, 2^643663060 is an apocalyptic number.

It is an amenable number.

643663060 is an abundant number, since it is smaller than the sum of its proper divisors (708508460).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

643663060 is a wasteful number, since it uses less digits than its factorization.

643663060 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11415 (or 11413 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

The square root of 643663060 is about 25370.5155643318. The cubic root of 643663060 is about 863.4148791092.

It can be divided in two parts, 6436 and 63060, that added together give a palindrome (69496).

The spelling of 643663060 in words is "six hundred forty-three million, six hundred sixty-three thousand, sixty".