643366635102 has 24 divisors (see below), whose sum is σ = 1393994441736. Its totient is φ = 214450406736.

The previous prime is 643366635059. The next prime is 643366635127. The reversal of 643366635102 is 201536663346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 385753 + ... + 1198139.

It is an arithmetic number, because the mean of its divisors is an integer number (58083101739).

Almost surely, 2^643366635102 is an apocalyptic number.

643366635102 is an abundant number, since it is smaller than the sum of its proper divisors (750627806634).

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

643366635102 is a wasteful number, since it uses less digits than its factorization.

643366635102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 856392 (or 856389 counting only the distinct ones).

The product of its (nonzero) digits is 1399680, while the sum is 45.

The spelling of 643366635102 in words is "six hundred forty-three billion, three hundred sixty-six million, six hundred thirty-five thousand, one hundred two".