40403043243 has 40 divisors (see below), whose sum is σ = 61050675840. Its totient is φ = 26625646080.

The previous prime is 40403043211. The next prime is 40403043257. The reversal of 40403043243 is 34234030404.

It is not a de Polignac number, because 40403043243 - 2⁵ = 40403043211 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (40403043203) 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 39 ways as a sum of consecutive naturals, for example, 7783693 + ... + 7788881.

It is an arithmetic number, because the mean of its divisors is an integer number (1526266896).

Almost surely, 2^40403043243 is an apocalyptic number.

40403043243 is a deficient number, since it is larger than the sum of its proper divisors (20647632597).

40403043243 is an equidigital number, since it uses as much as digits as its factorization.

40403043243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6289 (or 6280 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 27.

Adding to 40403043243 its reverse (34234030404), we get a palindrome (74637073647).

The spelling of 40403043243 in words is "forty billion, four hundred three million, forty-three thousand, two hundred forty-three".