55055055035581 has 2 divisors, whose sum is σ = 55055055035582. Its totient is φ = 55055055035580.

The previous prime is 55055055035527. The next prime is 55055055035623. The reversal of 55055055035581 is 18553055055055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39020436329956 + 16034618705625 = 6246634^2 + 4004325^2 .

It is a cyclic number.

It is not a de Polignac number, because 55055055035581 - 2¹³ = 55055055027389 is a prime.

It is a super-2 number, since 2×55055055035581² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55055055035381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27527527517790 + 27527527517791.

It is an arithmetic number, because the mean of its divisors is an integer number (27527527517791).

Almost surely, 2^{55055055035581} is an apocalyptic number.

It is an amenable number.

55055055035581 is a deficient number, since it is larger than the sum of its proper divisors (1).

55055055035581 is an equidigital number, since it uses as much as digits as its factorization.

55055055035581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9375000, while the sum is 52.

The spelling of 55055055035581 in words is "fifty-five trillion, fifty-five billion, fifty-five million, thirty-five thousand, five hundred eighty-one".