40447743733 has 2 divisors, whose sum is σ = 40447743734. Its totient is φ = 40447743732.

The previous prime is 40447743727. The next prime is 40447743797. The reversal of 40447743733 is 33734774404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32196201489 + 8251542244 = 179433^2 + 90838^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40447743733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40447743703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20223871866 + 20223871867.

It is an arithmetic number, because the mean of its divisors is an integer number (20223871867).

Almost surely, 2^40447743733 is an apocalyptic number.

It is an amenable number.

40447743733 is a deficient number, since it is larger than the sum of its proper divisors (1).

40447743733 is an equidigital number, since it uses as much as digits as its factorization.

40447743733 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 46.

The spelling of 40447743733 in words is "forty billion, four hundred forty-seven million, seven hundred forty-three thousand, seven hundred thirty-three".