5555908781 has 2 divisors, whose sum is σ = 5555908782. Its totient is φ = 5555908780.

The previous prime is 5555908777. The next prime is 5555908801. The reversal of 5555908781 is 1878095555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3932544100 + 1623364681 = 62710^2 + 40291^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555908781 - 2² = 5555908777 is a prime.

It is a super-2 number, since 2×5555908781² = 61736244765585811922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5555908741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777954390 + 2777954391.

It is an arithmetic number, because the mean of its divisors is an integer number (2777954391).

Almost surely, 2^5555908781 is an apocalyptic number.

It is an amenable number.

5555908781 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555908781 is an equidigital number, since it uses as much as digits as its factorization.

5555908781 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520000, while the sum is 53.

The square root of 5555908781 is about 74537.9687206460. The cubic root of 5555908781 is about 1771.1351503134.

The spelling of 5555908781 in words is "five billion, five hundred fifty-five million, nine hundred eight thousand, seven hundred eighty-one".