40555549 has 2 divisors, whose sum is σ = 40555550. Its totient is φ = 40555548.

The previous prime is 40555531. The next prime is 40555577. The reversal of 40555549 is 94555504.

40555549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39463524 + 1092025 = 6282^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 40555549 - 2⁵ = 40555517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40555349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20277774 + 20277775.

It is an arithmetic number, because the mean of its divisors is an integer number (20277775).

Almost surely, 2^40555549 is an apocalyptic number.

It is an amenable number.

40555549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40555549 is an equidigital number, since it uses as much as digits as its factorization.

40555549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 90000, while the sum is 37.

The square root of 40555549 is about 6368.3238768141. The cubic root of 40555549 is about 343.5712077825.

It can be divided in two parts, 4055 and 5549, that added together give a square (9604 = 98²).

The spelling of 40555549 in words is "forty million, five hundred fifty-five thousand, five hundred forty-nine".