40443623237 has 48 divisors (see below), whose sum is σ = 44710866000. Its totient is φ = 36558888960.

The previous prime is 40443623183. The next prime is 40443623257. The reversal of 40443623237 is 73232634404.

It is a Cunningham number, because it is equal to 201106²+1.

It can be written as a sum of positive squares in 24 ways, for example, as 26216143396 + 14227479841 = 161914^2 + 119279^2 .

It is not a de Polignac number, because 40443623237 - 2¹⁸ = 40443361093 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 40443623237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40443623257) 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 47 ways as a sum of consecutive naturals, for example, 233778083 + ... + 233778255.

It is an arithmetic number, because the mean of its divisors is an integer number (931476375).

Almost surely, 2^40443623237 is an apocalyptic number.

It is an amenable number.

40443623237 is a deficient number, since it is larger than the sum of its proper divisors (4267242763).

40443623237 is a wasteful number, since it uses less digits than its factorization.

40443623237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506 (or 489 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 38.

The spelling of 40443623237 in words is "forty billion, four hundred forty-three million, six hundred twenty-three thousand, two hundred thirty-seven".