1240344311403 has 16 divisors (see below), whose sum is σ = 1668622350240. Its totient is φ = 819482947584.

The previous prime is 1240344311383. The next prime is 1240344311501. The reversal of 1240344311403 is 3041134430421.

It is not a de Polignac number, because 1240344311403 - 2⁸ = 1240344311147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1240344311303) by changing a digit.

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, 2758263 + ... + 3176271.

It is an arithmetic number, because the mean of its divisors is an integer number (104288896890).

Almost surely, 2^{1240344311403} is an apocalyptic number.

1240344311403 is a deficient number, since it is larger than the sum of its proper divisors (428278038837).

1240344311403 is a wasteful number, since it uses less digits than its factorization.

1240344311403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426878.

The product of its (nonzero) digits is 13824, while the sum is 30.

Adding to 1240344311403 its reverse (3041134430421), we get a palindrome (4281478741824).

The spelling of 1240344311403 in words is "one trillion, two hundred forty billion, three hundred forty-four million, three hundred eleven thousand, four hundred three".