123313025440 has 96 divisors (see below), whose sum is σ = 320727496320. Its totient is φ = 44429644800.

The previous prime is 123313025413. The next prime is 123313025483. The reversal of 123313025440 is 44520313321.

It is a happy number.

It is a super-2 number, since 2×123313025440² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123313025399 and 123313025408.

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, 129556 + ... + 513235.

It is an arithmetic number, because the mean of its divisors is an integer number (3340911420).

Almost surely, 2^123313025440 is an apocalyptic number.

123313025440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123313025440 is an abundant number, since it is smaller than the sum of its proper divisors (197414470880).

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

123313025440 is a wasteful number, since it uses less digits than its factorization.

123313025440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 642926 (or 642918 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 123313025440 its reverse (44520313321), we get a palindrome (167833338761).

The spelling of 123313025440 in words is "one hundred twenty-three billion, three hundred thirteen million, twenty-five thousand, four hundred forty".