505005555801 has 8 divisors (see below), whose sum is σ = 708779727520. Its totient is φ = 318950877312.

The previous prime is 505005555787. The next prime is 505005555841. The reversal of 505005555801 is 108555500505.

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

It is not a de Polignac number, because 505005555801 - 2¹¹ = 505005553753 is a prime.

It is a super-2 number, since 2×505005555801² (a number of 24 digits) contains 22 as substring.

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 505005555801.

It is not an unprimeable number, because it can be changed into a prime (505005555841) 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, 4429873240 + ... + 4429873353.

It is an arithmetic number, because the mean of its divisors is an integer number (88597465940).

Almost surely, 2^505005555801 is an apocalyptic number.

It is an amenable number.

505005555801 is a deficient number, since it is larger than the sum of its proper divisors (203774171719).

505005555801 is a wasteful number, since it uses less digits than its factorization.

505005555801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8859746615.

The product of its (nonzero) digits is 125000, while the sum is 39.

The spelling of 505005555801 in words is "five hundred five billion, five million, five hundred fifty-five thousand, eight hundred one".