123555655 has 16 divisors (see below), whose sum is σ = 155105280. Its totient is φ = 94307488.

The previous prime is 123555647. The next prime is 123555659. The reversal of 123555655 is 556555321.

It is a cyclic number.

It is not a de Polignac number, because 123555655 - 2³ = 123555647 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123555659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53964 + ... + 56206.

It is an arithmetic number, because the mean of its divisors is an integer number (9694080).

Almost surely, 2^123555655 is an apocalyptic number.

123555655 is a deficient number, since it is larger than the sum of its proper divisors (31549625).

123555655 is a wasteful number, since it uses less digits than its factorization.

123555655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2750.

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

The square root of 123555655 is about 11115.5591402322. The cubic root of 123555655 is about 498.0667413225.

The spelling of 123555655 in words is "one hundred twenty-three million, five hundred fifty-five thousand, six hundred fifty-five".