1240243436536 has 64 divisors (see below), whose sum is σ = 2673274060800. Its totient is φ = 534654691200.

The previous prime is 1240243436533. The next prime is 1240243436591. The reversal of 1240243436536 is 6356343420421.

It is a junction number, because it is equal to n+sod(n) for n = 1240243436492 and 1240243436501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240243436533) 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 15 ways as a sum of consecutive naturals, for example, 4279800 + ... + 4560391.

It is an arithmetic number, because the mean of its divisors is an integer number (41769907200).

Almost surely, 2^{1240243436536} is an apocalyptic number.

It is an amenable number.

1240243436536 is an abundant number, since it is smaller than the sum of its proper divisors (1433030624264).

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

1240243436536 is a wasteful number, since it uses less digits than its factorization.

1240243436536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8840300 (or 8840296 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 43.

Adding to 1240243436536 its reverse (6356343420421), we get a palindrome (7596586856957).

The spelling of 1240243436536 in words is "one trillion, two hundred forty billion, two hundred forty-three million, four hundred thirty-six thousand, five hundred thirty-six".