123733164520 has 128 divisors (see below), whose sum is σ = 325024358400. Its totient is φ = 41515520256.

The previous prime is 123733164433. The next prime is 123733164589. The reversal of 123733164520 is 25461337321.

It is a self number, because there is not a number n which added to its sum of digits gives 123733164520.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3667167 + ... + 3700753.

It is an arithmetic number, because the mean of its divisors is an integer number (2539252800).

Almost surely, 2^123733164520 is an apocalyptic number.

123733164520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123733164520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162512179200).

123733164520 is an abundant number, since it is smaller than the sum of its proper divisors (201291193880).

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

123733164520 is a wasteful number, since it uses less digits than its factorization.

123733164520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33887 (or 33883 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 37.

The spelling of 123733164520 in words is "one hundred twenty-three billion, seven hundred thirty-three million, one hundred sixty-four thousand, five hundred twenty".