5555611728361 has 2 divisors, whose sum is σ = 5555611728362. Its totient is φ = 5555611728360.

The previous prime is 5555611728341. The next prime is 5555611728413. The reversal of 5555611728361 is 1638271165555.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2914596713961 + 2641015014400 = 1707219^2 + 1625120^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555611728361 - 2⁹ = 5555611727849 is a prime.

It is not a weakly prime, because it can be changed into another prime (5555611728341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777805864180 + 2777805864181.

It is an arithmetic number, because the mean of its divisors is an integer number (2777805864181).

Almost surely, 2^{5555611728361} is an apocalyptic number.

It is an amenable number.

5555611728361 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555611728361 is an equidigital number, since it uses as much as digits as its factorization.

5555611728361 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7560000, while the sum is 55.

The spelling of 5555611728361 in words is "five trillion, five hundred fifty-five billion, six hundred eleven million, seven hundred twenty-eight thousand, three hundred sixty-one".