505845712985 has 8 divisors (see below), whose sum is σ = 607018675776. Its totient is φ = 404674023600.

The previous prime is 505845712877. The next prime is 505845713003. The reversal of 505845712985 is 589217548505.

It is a happy number.

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

It is not a de Polignac number, because 505845712985 - 2¹⁸ = 505845450841 is a prime.

It is a super-2 number, since 2×505845712985² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1359410 + ... + 1691060.

It is an arithmetic number, because the mean of its divisors is an integer number (75877334472).

Almost surely, 2^505845712985 is an apocalyptic number.

It is an amenable number.

505845712985 is a deficient number, since it is larger than the sum of its proper divisors (101172962791).

505845712985 is a wasteful number, since it uses less digits than its factorization.

505845712985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636703.

The product of its (nonzero) digits is 20160000, while the sum is 59.

The spelling of 505845712985 in words is "five hundred five billion, eight hundred forty-five million, seven hundred twelve thousand, nine hundred eighty-five".