123056145440 has 96 divisors (see below), whose sum is σ = 302096148480. Its totient is φ = 47311617024.

The previous prime is 123056145409. The next prime is 123056145461. The reversal of 123056145440 is 44541650321.

It is a self number, because there is not a number n which added to its sum of digits gives 123056145440.

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 15 ways as a sum of consecutive naturals, for example, 975257 + ... + 1094183.

It is an arithmetic number, because the mean of its divisors is an integer number (3146834880).

Almost surely, 2^123056145440 is an apocalyptic number.

123056145440 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 123056145440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151048074240).

123056145440 is an abundant number, since it is smaller than the sum of its proper divisors (179040003040).

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

123056145440 is a wasteful number, since it uses less digits than its factorization.

123056145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119194 (or 119186 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 35.

Adding to 123056145440 its reverse (44541650321), we get a palindrome (167597795761).

The spelling of 123056145440 in words is "one hundred twenty-three billion, fifty-six million, one hundred forty-five thousand, four hundred forty".