123606215665 has 16 divisors (see below), whose sum is σ = 153914656896. Its totient is φ = 95224953600.

The previous prime is 123606215657. The next prime is 123606215669. The reversal of 123606215665 is 566512606321.

It is not a de Polignac number, because 123606215665 - 2³ = 123606215657 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123606215669) 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 15 ways as a sum of consecutive naturals, for example, 4033416 + ... + 4063945.

It is an arithmetic number, because the mean of its divisors is an integer number (9619666056).

Almost surely, 2^123606215665 is an apocalyptic number.

It is an amenable number.

123606215665 is a deficient number, since it is larger than the sum of its proper divisors (30308441231).

123606215665 is an equidigital number, since it uses as much as digits as its factorization.

123606215665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8097480.

The product of its (nonzero) digits is 388800, while the sum is 43.

The spelling of 123606215665 in words is "one hundred twenty-three billion, six hundred six million, two hundred fifteen thousand, six hundred sixty-five".