55050505505561 has 4 divisors (see below), whose sum is σ = 55050688273152. Its totient is φ = 55050322737972.

The previous prime is 55050505505557. The next prime is 55050505505573. The reversal of 55050505505561 is 16550550505055.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 55050505505561 - 2² = 55050505505557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55050505505551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90931241 + ... + 91534646.

It is an arithmetic number, because the mean of its divisors is an integer number (13762672068288).

Almost surely, 2^{55050505505561} is an apocalyptic number.

It is an amenable number.

55050505505561 is a deficient number, since it is larger than the sum of its proper divisors (182767591).

55050505505561 is a wasteful number, since it uses less digits than its factorization.

55050505505561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182767590.

The product of its (nonzero) digits is 2343750, while the sum is 47.

The spelling of 55050505505561 in words is "fifty-five trillion, fifty billion, five hundred five million, five hundred five thousand, five hundred sixty-one".