5550505559581 has 2 divisors, whose sum is σ = 5550505559582. Its totient is φ = 5550505559580.

The previous prime is 5550505559567. The next prime is 5550505559593. The reversal of 5550505559581 is 1859555050555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5419816802500 + 130688757081 = 2328050^2 + 361509^2 .

It is a cyclic number.

It is not a de Polignac number, because 5550505559581 - 2⁵ = 5550505559549 is a prime.

It is a super-2 number, since 2×5550505559581² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5550505559551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775252779790 + 2775252779791.

It is an arithmetic number, because the mean of its divisors is an integer number (2775252779791).

Almost surely, 2^{5550505559581} is an apocalyptic number.

It is an amenable number.

5550505559581 is a deficient number, since it is larger than the sum of its proper divisors (1).

5550505559581 is an equidigital number, since it uses as much as digits as its factorization.

5550505559581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28125000, while the sum is 58.

The spelling of 5550505559581 in words is "five trillion, five hundred fifty billion, five hundred five million, five hundred fifty-nine thousand, five hundred eighty-one".