123310387780 has 12 divisors (see below), whose sum is σ = 258951814380. Its totient is φ = 49324155104.

The previous prime is 123310387777. The next prime is 123310387789. The reversal of 123310387780 is 87783013321.

123310387780 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 91334510656 + 31975877124 = 302216^2 + 178818^2 .

It is not an unprimeable number, because it can be changed into a prime (123310387789) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3082759675 + ... + 3082759714.

It is an arithmetic number, because the mean of its divisors is an integer number (21579317865).

Almost surely, 2^123310387780 is an apocalyptic number.

123310387780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123310387780 is an abundant number, since it is smaller than the sum of its proper divisors (135641426600).

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

123310387780 is a wasteful number, since it uses less digits than its factorization.

123310387780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6165519398 (or 6165519396 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 43.

The spelling of 123310387780 in words is "one hundred twenty-three billion, three hundred ten million, three hundred eighty-seven thousand, seven hundred eighty".