40440310243 has 16 divisors (see below), whose sum is σ = 43111512576. Its totient is φ = 37802229760.

The previous prime is 40440310231. The next prime is 40440310249. The reversal of 40440310243 is 34201304404.

It is a cyclic number.

It is not a de Polignac number, because 40440310243 - 2²¹ = 40438213091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40440310249) 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, 2110755 + ... + 2129827.

It is an arithmetic number, because the mean of its divisors is an integer number (2694469536).

Almost surely, 2^40440310243 is an apocalyptic number.

40440310243 is a deficient number, since it is larger than the sum of its proper divisors (2671202333).

40440310243 is a wasteful number, since it uses less digits than its factorization.

40440310243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19934.

The product of its (nonzero) digits is 4608, while the sum is 25.

Adding to 40440310243 its reverse (34201304404), we get a palindrome (74641614647).

The spelling of 40440310243 in words is "forty billion, four hundred forty million, three hundred ten thousand, two hundred forty-three".