505561011061 has 8 divisors (see below), whose sum is σ = 506571038624. Its totient is φ = 504551918160.

The previous prime is 505561011031. The next prime is 505561011071. The reversal of 505561011061 is 160110165505.

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 505561011061 - 2³¹ = 503413527413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505561011001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 854266 + ... + 1319428.

It is an arithmetic number, because the mean of its divisors is an integer number (63321379828).

Almost surely, 2^505561011061 is an apocalyptic number.

It is an amenable number.

505561011061 is a deficient number, since it is larger than the sum of its proper divisors (1010027563).

505561011061 is a wasteful number, since it uses less digits than its factorization.

505561011061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467331.

The product of its (nonzero) digits is 4500, while the sum is 31.

Adding to 505561011061 its reverse (160110165505), we get a palindrome (665671176566).

The spelling of 505561011061 in words is "five hundred five billion, five hundred sixty-one million, eleven thousand, sixty-one".