123105301540 has 96 divisors (see below), whose sum is σ = 282146465664. Its totient is φ = 44846714880.

The previous prime is 123105301537. The next prime is 123105301573. The reversal of 123105301540 is 45103501321.

It is a happy number.

123105301540 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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, 8340447 + ... + 8355193.

It is an arithmetic number, because the mean of its divisors is an integer number (2939025684).

Almost surely, 2^123105301540 is an apocalyptic number.

123105301540 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 123105301540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141073232832).

123105301540 is an abundant number, since it is smaller than the sum of its proper divisors (159041164124).

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

123105301540 is a wasteful number, since it uses less digits than its factorization.

123105301540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15197 (or 15195 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 123105301540 its reverse (45103501321), we get a palindrome (168208802861).

The spelling of 123105301540 in words is "one hundred twenty-three billion, one hundred five million, three hundred one thousand, five hundred forty".