40173744437 has 2 divisors, whose sum is σ = 40173744438. Its totient is φ = 40173744436.

The previous prime is 40173744433. The next prime is 40173744473. The reversal of 40173744437 is 73444737104.

It is a happy number.

Together with next prime (40173744473) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27224670001 + 12949074436 = 164999^2 + 113794^2 .

It is a cyclic number.

It is not a de Polignac number, because 40173744437 - 2² = 40173744433 is a prime.

It is a super-2 number, since 2×40173744437² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40173744431) 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 as a sum of consecutive naturals, namely, 20086872218 + 20086872219.

It is an arithmetic number, because the mean of its divisors is an integer number (20086872219).

Almost surely, 2^40173744437 is an apocalyptic number.

It is an amenable number.

40173744437 is a deficient number, since it is larger than the sum of its proper divisors (1).

40173744437 is an equidigital number, since it uses as much as digits as its factorization.

40173744437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 790272, while the sum is 44.

The spelling of 40173744437 in words is "forty billion, one hundred seventy-three million, seven hundred forty-four thousand, four hundred thirty-seven".