643116063103 has 16 divisors (see below), whose sum is σ = 689298482880. Its totient is φ = 598456083456.

The previous prime is 643116063091. The next prime is 643116063173. The reversal of 643116063103 is 301360611346.

It is a cyclic number.

It is not a de Polignac number, because 643116063103 - 2²¹ = 643113965951 is a prime.

It is a super-2 number, since 2×643116063103² (a number of 24 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 (643116063173) 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, 7751343 + ... + 7833871.

It is an arithmetic number, because the mean of its divisors is an integer number (43081155180).

Almost surely, 2^643116063103 is an apocalyptic number.

643116063103 is a deficient number, since it is larger than the sum of its proper divisors (46182419777).

643116063103 is a wasteful number, since it uses less digits than its factorization.

643116063103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91746.

The product of its (nonzero) digits is 23328, while the sum is 34.

Adding to 643116063103 its reverse (301360611346), we get a palindrome (944476674449).

The spelling of 643116063103 in words is "six hundred forty-three billion, one hundred sixteen million, sixty-three thousand, one hundred three".