123501350440 has 128 divisors (see below), whose sum is σ = 321320805120. Its totient is φ = 42313420800.

The previous prime is 123501350431. The next prime is 123501350449. The reversal of 123501350440 is 44053105321.

It is an interprime number because it is at equal distance from previous prime (123501350431) and next prime (123501350449).

It is a junction number, because it is equal to n+sod(n) for n = 123501350399 and 123501350408.

It is not an unprimeable number, because it can be changed into a prime (123501350449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 529255 + ... + 726025.

It is an arithmetic number, because the mean of its divisors is an integer number (2510318790).

Almost surely, 2^123501350440 is an apocalyptic number.

123501350440 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 123501350440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160660402560).

123501350440 is an abundant number, since it is smaller than the sum of its proper divisors (197819454680).

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

123501350440 is a wasteful number, since it uses less digits than its factorization.

123501350440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196883 (or 196879 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

Adding to 123501350440 its reverse (44053105321), we get a palindrome (167554455761).

The spelling of 123501350440 in words is "one hundred twenty-three billion, five hundred one million, three hundred fifty thousand, four hundred forty".