123638607085 has 16 divisors (see below), whose sum is σ = 170073804672. Its totient is φ = 84524616000.

The previous prime is 123638607073. The next prime is 123638607089. The reversal of 123638607085 is 580706836321.

It is not a de Polignac number, because 123638607085 - 2⁹ = 123638606573 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 (123638607089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5324566 + ... + 5347735.

It is an arithmetic number, because the mean of its divisors is an integer number (10629612792).

Almost surely, 2^123638607085 is an apocalyptic number.

It is an amenable number.

123638607085 is a deficient number, since it is larger than the sum of its proper divisors (46435197587).

123638607085 is a wasteful number, since it uses less digits than its factorization.

123638607085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10672644.

The product of its (nonzero) digits is 1451520, while the sum is 49.

The spelling of 123638607085 in words is "one hundred twenty-three billion, six hundred thirty-eight million, six hundred seven thousand, eighty-five".