643102641052 has 48 divisors (see below), whose sum is σ = 1155650872320. Its totient is φ = 312996012992.

The previous prime is 643102641047. The next prime is 643102641059. The reversal of 643102641052 is 250146201346.

It is a junction number, because it is equal to n+sod(n) for n = 643102640999 and 643102641017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643102641059) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26388849 + ... + 26413207.

It is an arithmetic number, because the mean of its divisors is an integer number (24076059840).

Almost surely, 2^643102641052 is an apocalyptic number.

It is an amenable number.

643102641052 is a deficient number, since it is larger than the sum of its proper divisors (512548231268).

643102641052 is a wasteful number, since it uses less digits than its factorization.

643102641052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25170 (or 25168 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

Adding to 643102641052 its reverse (250146201346), we get a palindrome (893248842398).

The spelling of 643102641052 in words is "six hundred forty-three billion, one hundred two million, six hundred forty-one thousand, fifty-two".