123665143325 has 6 divisors (see below), whose sum is σ = 153344777754. Its totient is φ = 98932114640.

The previous prime is 123665143289. The next prime is 123665143331. The reversal of 123665143325 is 523341566321.

It can be written as a sum of positive squares in 3 ways, for example, as 504855961 + 123160287364 = 22469^2 + 350942^2 .

It is not a de Polignac number, because 123665143325 - 2¹² = 123665139229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 2473302842 + ... + 2473302891.

It is an arithmetic number, because the mean of its divisors is an integer number (25557462959).

Almost surely, 2^123665143325 is an apocalyptic number.

It is an amenable number.

123665143325 is a deficient number, since it is larger than the sum of its proper divisors (29679634429).

123665143325 is an equidigital number, since it uses as much as digits as its factorization.

123665143325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4946605743 (or 4946605738 counting only the distinct ones).

The product of its digits is 388800, while the sum is 41.

The spelling of 123665143325 in words is "one hundred twenty-three billion, six hundred sixty-five million, one hundred forty-three thousand, three hundred twenty-five".