123604648789 has 6 divisors (see below), whose sum is σ = 130452552150. Its totient is φ = 117099140616.

The previous prime is 123604648763. The next prime is 123604648807. The reversal of 123604648789 is 987846406321.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70251502500 + 53353146289 = 265050^2 + 230983^2 .

It is not a de Polignac number, because 123604648789 - 2⁵ = 123604648757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123604648729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171197214 + ... + 171197935.

It is an arithmetic number, because the mean of its divisors is an integer number (21742092025).

Almost surely, 2^123604648789 is an apocalyptic number.

123604648789 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

123604648789 is a deficient number, since it is larger than the sum of its proper divisors (6847903361).

123604648789 is an equidigital number, since it uses as much as digits as its factorization.

123604648789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 342395187 (or 342395168 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 58.

The spelling of 123604648789 in words is "one hundred twenty-three billion, six hundred four million, six hundred forty-eight thousand, seven hundred eighty-nine".