643305600403101 has 16 divisors (see below), whose sum is σ = 964811325710720. Its totient is φ = 428870400267276.

The previous prime is 643305600403093. The next prime is 643305600403181. The reversal of 643305600403101 is 101304006503346.

643305600403101 is a `hidden beast` number, since 6 + 4 + 3 + 3 + 0 + 5 + 600 + 40 + 3 + 1 + 0 + 1 = 666.

It is not a de Polignac number, because 643305600403101 - 2³ = 643305600403093 is a prime.

It is a super-2 number, since 2×643305600403101² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643305600403181) 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, 147074895025 + ... + 147074899398.

It is an arithmetic number, because the mean of its divisors is an integer number (60300707856920).

Almost surely, 2^{643305600403101} is an apocalyptic number.

It is an amenable number.

643305600403101 is a deficient number, since it is larger than the sum of its proper divisors (321505725307619).

643305600403101 is an frugal number, since it uses more digits than its factorization.

643305600403101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294149794444 (or 294149794426 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 36.

Adding to 643305600403101 its reverse (101304006503346), we get a palindrome (744609606906447).

The spelling of 643305600403101 in words is "six hundred forty-three trillion, three hundred five billion, six hundred million, four hundred three thousand, one hundred one".