40866442747873 has 2 divisors, whose sum is σ = 40866442747874. Its totient is φ = 40866442747872.

The previous prime is 40866442747831. The next prime is 40866442747909. The reversal of 40866442747873 is 37874724466804.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40560951087504 + 305491660369 = 6368748^2 + 552713^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40866442747873 is a prime.

It is a super-2 number, since 2×40866442747873² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40866442747813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20433221373936 + 20433221373937.

It is an arithmetic number, because the mean of its divisors is an integer number (20433221373937).

Almost surely, 2^{40866442747873} is an apocalyptic number.

It is an amenable number.

40866442747873 is a deficient number, since it is larger than the sum of its proper divisors (1).

40866442747873 is an equidigital number, since it uses as much as digits as its factorization.

40866442747873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1213857792, while the sum is 70.

The spelling of 40866442747873 in words is "forty trillion, eight hundred sixty-six billion, four hundred forty-two million, seven hundred forty-seven thousand, eight hundred seventy-three".