123118264481689 has 27 divisors (see below), whose sum is σ = 135839734023189. Its totient is φ = 111562728999480.

The previous prime is 123118264481683. The next prime is 123118264481789. The reversal of 123118264481689 is 986184462811321.

The square root of 123118264481689 is 11095867.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 123118264481689 - 2⁵ = 123118264481657 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123118264481689.

It is not an unprimeable number, because it can be changed into a prime (123118264481683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4848881184 + ... + 4848906574.

Almost surely, 2^{123118264481689} is an apocalyptic number.

123118264481689 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

123118264481689 is the 11095867-th square number.

123118264481689 is the 5547934-th centered octagonal number.

It is an amenable number.

123118264481689 is a deficient number, since it is larger than the sum of its proper divisors (12721469541500).

123118264481689 is an frugal number, since it uses more digits than its factorization.

123118264481689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50866 (or 25433 counting only the distinct ones).

The product of its digits is 31850496, while the sum is 64.

The spelling of 123118264481689 in words is "one hundred twenty-three trillion, one hundred eighteen billion, two hundred sixty-four million, four hundred eighty-one thousand, six hundred eighty-nine".