123555556 has 24 divisors (see below), whose sum is σ = 229632480. Its totient is φ = 58004352.

The previous prime is 123555529. The next prime is 123555557. The reversal of 123555556 is 655555321.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (123555557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1395 + ... + 15781.

It is an arithmetic number, because the mean of its divisors is an integer number (9568020).

Almost surely, 2^123555556 is an apocalyptic number.

It is an amenable number.

123555556 is a deficient number, since it is larger than the sum of its proper divisors (106076924).

123555556 is a wasteful number, since it uses less digits than its factorization.

123555556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14523 (or 14521 counting only the distinct ones).

The product of its digits is 112500, while the sum is 37.

The square root of 123555556 is about 11115.5546870140. The cubic root of 123555556 is about 498.0666082957.

The spelling of 123555556 in words is "one hundred twenty-three million, five hundred fifty-five thousand, five hundred fifty-six".