643143553052 has 48 divisors (see below), whose sum is σ = 1511162483712. Its totient is φ = 231300377280.

The previous prime is 643143553009. The next prime is 643143553079. The reversal of 643143553052 is 250355341346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80308628 + ... + 80316635.

It is an arithmetic number, because the mean of its divisors is an integer number (31482551744).

Almost surely, 2^643143553052 is an apocalyptic number.

It is an amenable number.

643143553052 is an abundant number, since it is smaller than the sum of its proper divisors (868018930660).

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

643143553052 is a wasteful number, since it uses less digits than its factorization.

643143553052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160625298 (or 160625296 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 643143553052 its reverse (250355341346), we get a palindrome (893498894398).

The spelling of 643143553052 in words is "six hundred forty-three billion, one hundred forty-three million, five hundred fifty-three thousand, fifty-two".