505561010101 has 8 divisors (see below), whose sum is σ = 579393440640. Its totient is φ = 432130936848.

The previous prime is 505561010093. The next prime is 505561010113. The reversal of 505561010101 is 101010165505.

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 505561010101 - 2³ = 505561010093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505561070101) 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, 100586626 + ... + 100591651.

It is an arithmetic number, because the mean of its divisors is an integer number (72424180080).

Almost surely, 2^505561010101 is an apocalyptic number.

It is an amenable number.

505561010101 is a deficient number, since it is larger than the sum of its proper divisors (73832430539).

505561010101 is a wasteful number, since it uses less digits than its factorization.

505561010101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201178643.

The product of its (nonzero) digits is 750, while the sum is 25.

Adding to 505561010101 its reverse (101010165505), we get a palindrome (606571175606).

The spelling of 505561010101 in words is "five hundred five billion, five hundred sixty-one million, ten thousand, one hundred one".