123138685662 has 8 divisors (see below), whose sum is σ = 246277371336. Its totient is φ = 41046228552.

The previous prime is 123138685661. The next prime is 123138685667. The reversal of 123138685662 is 266586831321.

123138685662 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

123138685662 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123138685661) 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, 10261557133 + ... + 10261557144.

It is an arithmetic number, because the mean of its divisors is an integer number (30784671417).

Almost surely, 2^123138685662 is an apocalyptic number.

123138685662 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

123138685662 is a wasteful number, since it uses less digits than its factorization.

123138685662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20523114282.

The product of its digits is 2488320, while the sum is 51.

The spelling of 123138685662 in words is "one hundred twenty-three billion, one hundred thirty-eight million, six hundred eighty-five thousand, six hundred sixty-two".