5555555555401 has 2 divisors, whose sum is σ = 5555555555402. Its totient is φ = 5555555555400.

The previous prime is 5555555555327. The next prime is 5555555555441. The reversal of 5555555555401 is 1045555555555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3357085095225 + 2198470460176 = 1832235^2 + 1482724^2 .

It is a cyclic number.

It is not a de Polignac number, because 5555555555401 - 2⁷ = 5555555555273 is a prime.

It is not a weakly prime, because it can be changed into another prime (5555555555441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777777777700 + 2777777777701.

It is an arithmetic number, because the mean of its divisors is an integer number (2777777777701).

Almost surely, 2^{5555555555401} is an apocalyptic number.

It is an amenable number.

5555555555401 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555555555401 is an equidigital number, since it uses as much as digits as its factorization.

5555555555401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39062500, while the sum is 55.

The spelling of 5555555555401 in words is "five trillion, five hundred fifty-five billion, five hundred fifty-five million, five hundred fifty-five thousand, four hundred one".