55555005000581 has 2 divisors, whose sum is σ = 55555005000582. Its totient is φ = 55555005000580.

The previous prime is 55555005000491. The next prime is 55555005000589. The reversal of 55555005000581 is 18500050055555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41774828589025 + 13780176411556 = 6463345^2 + 3712166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55555005000581 is a prime.

It is a super-3 number, since 3×55555005000581³ (a number of 42 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55555005000589) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27777502500290 + 27777502500291.

It is an arithmetic number, because the mean of its divisors is an integer number (27777502500291).

Almost surely, 2^{55555005000581} is an apocalyptic number.

It is an amenable number.

55555005000581 is a deficient number, since it is larger than the sum of its proper divisors (1).

55555005000581 is an equidigital number, since it uses as much as digits as its factorization.

55555005000581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 625000, while the sum is 44.

The spelling of 55555005000581 in words is "fifty-five trillion, five hundred fifty-five billion, five million, five hundred eighty-one", and thus it is an aban number.