123661780415268 has 12 divisors (see below), whose sum is σ = 288544154302320. Its totient is φ = 41220593471752.

The previous prime is 123661780415209. The next prime is 123661780415279. The reversal of 123661780415268 is 862514087166321.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5152574183958 + ... + 5152574183981.

It is an arithmetic number, because the mean of its divisors is an integer number (24045346191860).

Almost surely, 2^{123661780415268} is an apocalyptic number.

It is an amenable number.

123661780415268 is an abundant number, since it is smaller than the sum of its proper divisors (164882373887052).

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

123661780415268 is a wasteful number, since it uses less digits than its factorization.

123661780415268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10305148367946 (or 10305148367944 counting only the distinct ones).

The product of its (nonzero) digits is 23224320, while the sum is 60.

The spelling of 123661780415268 in words is "one hundred twenty-three trillion, six hundred sixty-one billion, seven hundred eighty million, four hundred fifteen thousand, two hundred sixty-eight".