123555666900 has 72 divisors (see below), whose sum is σ = 357523929504. Its totient is φ = 32944841600.

The previous prime is 123555666893. The next prime is 123555666917. The reversal of 123555666900 is 9666555321.

123555666900 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×123555666900² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 123555666900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4805479 + ... + 4831121.

It is an arithmetic number, because the mean of its divisors is an integer number (4965610132).

Almost surely, 2^123555666900 is an apocalyptic number.

123555666900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123555666900 is an abundant number, since it is smaller than the sum of its proper divisors (233968262604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123555666900 is a wasteful number, since it uses less digits than its factorization.

123555666900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41721 (or 41714 counting only the distinct ones).

The product of its (nonzero) digits is 1458000, while the sum is 48.

The spelling of 123555666900 in words is "one hundred twenty-three billion, five hundred fifty-five million, six hundred sixty-six thousand, nine hundred".