123035216643 has 12 divisors (see below), whose sum is σ = 178005578088. Its totient is φ = 81890534880.

The previous prime is 123035216621. The next prime is 123035216653. The reversal of 123035216643 is 346612530321.

123035216643 is a `hidden beast` number, since 1 + 2 + 3 + 0 + 3 + 5 + 2 + 1 + 6 + 643 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-123035216643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 123035216598 and 123035216607.

It is not an unprimeable number, because it can be changed into a prime (123035216653) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11072713 + ... + 11083818.

It is an arithmetic number, because the mean of its divisors is an integer number (14833798174).

Almost surely, 2^123035216643 is an apocalyptic number.

123035216643 is a deficient number, since it is larger than the sum of its proper divisors (54970361445).

123035216643 is a wasteful number, since it uses less digits than its factorization.

123035216643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22157154 (or 22157151 counting only the distinct ones).

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

Adding to 123035216643 its reverse (346612530321), we get a palindrome (469647746964).

The spelling of 123035216643 in words is "one hundred twenty-three billion, thirty-five million, two hundred sixteen thousand, six hundred forty-three".