123662643423 has 16 divisors (see below), whose sum is σ = 181080144000. Its totient is φ = 74444053280.

The previous prime is 123662643421. The next prime is 123662643437. The reversal of 123662643423 is 324346266321.

It is a cyclic number.

It is not a de Polignac number, because 123662643423 - 2¹ = 123662643421 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123662643421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12570093 + ... + 12579926.

It is an arithmetic number, because the mean of its divisors is an integer number (11317509000).

Almost surely, 2^123662643423 is an apocalyptic number.

123662643423 is a deficient number, since it is larger than the sum of its proper divisors (57417500577).

123662643423 is a wasteful number, since it uses less digits than its factorization.

123662643423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25150182.

The product of its digits is 746496, while the sum is 42.

The spelling of 123662643423 in words is "one hundred twenty-three billion, six hundred sixty-two million, six hundred forty-three thousand, four hundred twenty-three".