5555055665561 has 8 divisors (see below), whose sum is σ = 5886671496000. Its totient is φ = 5227364283120.

The previous prime is 5555055665557. The next prime is 5555055665617. The reversal of 5555055665561 is 1655665505555.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5555055665561 - 2² = 5555055665557 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5555055665561.

It is not an unprimeable number, because it can be changed into a prime (5555055665521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 981109085 + ... + 981114746.

It is an arithmetic number, because the mean of its divisors is an integer number (735833937000).

Almost surely, 2^{5555055665561} is an apocalyptic number.

It is an amenable number.

5555055665561 is a deficient number, since it is larger than the sum of its proper divisors (331615830439).

5555055665561 is a wasteful number, since it uses less digits than its factorization.

5555055665561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1962223999.

The product of its (nonzero) digits is 84375000, while the sum is 59.

The spelling of 5555055665561 in words is "five trillion, five hundred fifty-five billion, fifty-five million, six hundred sixty-five thousand, five hundred sixty-one".