40555789889 has 2 divisors, whose sum is σ = 40555789890. Its totient is φ = 40555789888.

The previous prime is 40555789843. The next prime is 40555789931. The reversal of 40555789889 is 98898755504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36598750864 + 3957039025 = 191308^2 + 62905^2 .

It is a cyclic number.

It is not a de Polignac number, because 40555789889 - 2¹⁶ = 40555724353 is a prime.

It is not a weakly prime, because it can be changed into another prime (40555789189) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20277894944 + 20277894945.

It is an arithmetic number, because the mean of its divisors is an integer number (20277894945).

Almost surely, 2^40555789889 is an apocalyptic number.

It is an amenable number.

40555789889 is a deficient number, since it is larger than the sum of its proper divisors (1).

40555789889 is an equidigital number, since it uses as much as digits as its factorization.

40555789889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 145152000, while the sum is 68.

The spelling of 40555789889 in words is "forty billion, five hundred fifty-five million, seven hundred eighty-nine thousand, eight hundred eighty-nine".