123555568 has 20 divisors (see below), whose sum is σ = 241000200. Its totient is φ = 61361984.

The previous prime is 123555557. The next prime is 123555569. The reversal of 123555568 is 865555321.

It is a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 123555568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123555569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23530 + ... + 28297.

It is an arithmetic number, because the mean of its divisors is an integer number (12050010).

Almost surely, 2^123555568 is an apocalyptic number.

It is an amenable number.

123555568 is a deficient number, since it is larger than the sum of its proper divisors (117444632).

123555568 is a wasteful number, since it uses less digits than its factorization.

123555568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51984 (or 51978 counting only the distinct ones).

The product of its digits is 180000, while the sum is 40.

The square root of 123555568 is about 11115.5552267982. Note that the first 3 decimals coincide. The cubic root of 123555568 is about 498.0666244202.

The spelling of 123555568 in words is "one hundred twenty-three million, five hundred fifty-five thousand, five hundred sixty-eight".