123643659560 has 16 divisors (see below), whose sum is σ = 278198234100. Its totient is φ = 49457463808.

The previous prime is 123643659523. The next prime is 123643659569. The reversal of 123643659560 is 65956346321.

123643659560 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 123640843876 + 2815684 = 351626^2 + 1678^2 .

It is a junction number, because it is equal to n+sod(n) for n = 123643659499 and 123643659508.

It is not an unprimeable number, because it can be changed into a prime (123643659569) 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 3 ways as a sum of consecutive naturals, for example, 1545545705 + ... + 1545545784.

Almost surely, 2^123643659560 is an apocalyptic number.

123643659560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123643659560 is an abundant number, since it is smaller than the sum of its proper divisors (154554574540).

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

123643659560 is a wasteful number, since it uses less digits than its factorization.

123643659560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091091500 (or 3091091496 counting only the distinct ones).

The product of its (nonzero) digits is 3499200, while the sum is 50.

The spelling of 123643659560 in words is "one hundred twenty-three billion, six hundred forty-three million, six hundred fifty-nine thousand, five hundred sixty".