123333661240 has 64 divisors (see below), whose sum is σ = 284663950560. Its totient is φ = 48065740800.

The previous prime is 123333661237. The next prime is 123333661247. The reversal of 123333661240 is 42166333321.

It is a super-2 number, since 2×123333661240² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123333661196 and 123333661205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123333661247) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 600312 + ... + 779128.

Almost surely, 2^123333661240 is an apocalyptic number.

123333661240 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 123333661240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (142331975280).

123333661240 is an abundant number, since it is smaller than the sum of its proper divisors (161330289320).

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

123333661240 is a wasteful number, since it uses less digits than its factorization.

123333661240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179272 (or 179268 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 34.

Adding to 123333661240 its reverse (42166333321), we get a palindrome (165499994561).

The spelling of 123333661240 in words is "one hundred twenty-three billion, three hundred thirty-three million, six hundred sixty-one thousand, two hundred forty".