123355344500 has 96 divisors (see below), whose sum is σ = 271296829440. Its totient is φ = 48997200000.

The previous prime is 123355344457. The next prime is 123355344533. The reversal of 123355344500 is 5443553321.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100369886 + ... + 100371114.

It is an arithmetic number, because the mean of its divisors is an integer number (2826008640).

Almost surely, 2^123355344500 is an apocalyptic number.

123355344500 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 123355344500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135648414720).

123355344500 is an abundant number, since it is smaller than the sum of its proper divisors (147941484940).

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

123355344500 is a wasteful number, since it uses less digits than its factorization.

123355344500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2490 (or 2478 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

Adding to 123355344500 its reverse (5443553321), we get a palindrome (128798897821).

The spelling of 123355344500 in words is "one hundred twenty-three billion, three hundred fifty-five million, three hundred forty-four thousand, five hundred".