5518668526601 has 2 divisors, whose sum is σ = 5518668526602. Its totient is φ = 5518668526600.

The previous prime is 5518668526559. The next prime is 5518668526633. The reversal of 5518668526601 is 1066258668155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3944597182201 + 1574071344400 = 1986101^2 + 1254620^2 .

It is a cyclic number.

It is not a de Polignac number, because 5518668526601 - 2¹⁰ = 5518668525577 is a prime.

It is a super-2 number, since 2×5518668526601² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5518668526801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2759334263300 + 2759334263301.

It is an arithmetic number, because the mean of its divisors is an integer number (2759334263301).

Almost surely, 2^{5518668526601} is an apocalyptic number.

It is an amenable number.

5518668526601 is a deficient number, since it is larger than the sum of its proper divisors (1).

5518668526601 is an equidigital number, since it uses as much as digits as its factorization.

5518668526601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736000, while the sum is 59.

The spelling of 5518668526601 in words is "five trillion, five hundred eighteen billion, six hundred sixty-eight million, five hundred twenty-six thousand, six hundred one".