5581025810081 has 2 divisors, whose sum is σ = 5581025810082. Its totient is φ = 5581025810080.

The previous prime is 5581025809981. The next prime is 5581025810111. The reversal of 5581025810081 is 1800185201855.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5139220990225 + 441804819856 = 2266985^2 + 664684^2 .

It is a cyclic number.

It is not a de Polignac number, because 5581025810081 - 2¹⁴ = 5581025793697 is a prime.

It is a super-2 number, since 2×5581025810081² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5581025810681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2790512905040 + 2790512905041.

It is an arithmetic number, because the mean of its divisors is an integer number (2790512905041).

Almost surely, 2^{5581025810081} is an apocalyptic number.

It is an amenable number.

5581025810081 is a deficient number, since it is larger than the sum of its proper divisors (1).

5581025810081 is an equidigital number, since it uses as much as digits as its factorization.

5581025810081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 128000, while the sum is 44.

The spelling of 5581025810081 in words is "five trillion, five hundred eighty-one billion, twenty-five million, eight hundred ten thousand, eighty-one".