12040145440 has 48 divisors (see below), whose sum is σ = 28471188312. Its totient is φ = 4811597824.

The previous prime is 12040145431. The next prime is 12040145471. The reversal of 12040145440 is 4454104021.

It can be written as a sum of positive squares in 4 ways, for example, as 5881662864 + 6158482576 = 76692^2 + 78476^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 141222 + ... + 209818.

Almost surely, 2^12040145440 is an apocalyptic number.

12040145440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12040145440 is an abundant number, since it is smaller than the sum of its proper divisors (16431042872).

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

12040145440 is a wasteful number, since it uses less digits than its factorization.

12040145440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69709 (or 69701 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 12040145440 its reverse (4454104021), we get a palindrome (16494249461).

The spelling of 12040145440 in words is "twelve billion, forty million, one hundred forty-five thousand, four hundred forty".