12400445240040 has 128 divisors (see below), whose sum is σ = 43705065801600. Its totient is φ = 2774924805120.

The previous prime is 12400445240033. The next prime is 12400445240047. The reversal of 12400445240040 is 4004254400421.

It is an interprime number because it is at equal distance from previous prime (12400445240033) and next prime (12400445240047).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (12400445240047) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 361301175 + ... + 361335494.

It is an arithmetic number, because the mean of its divisors is an integer number (341445826575).

Almost surely, 2^{12400445240040} is an apocalyptic number.

12400445240040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12400445240040 is an abundant number, since it is smaller than the sum of its proper divisors (31304620561560).

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

12400445240040 is a wasteful number, since it uses less digits than its factorization.

12400445240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722636707 (or 722636703 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 30.

Adding to 12400445240040 its reverse (4004254400421), we get a palindrome (16404699640461).

The spelling of 12400445240040 in words is "twelve trillion, four hundred billion, four hundred forty-five million, two hundred forty thousand, forty".