505385183720 has 32 divisors (see below), whose sum is σ = 1143689607720. Its totient is φ = 200985550080.

The previous prime is 505385183687. The next prime is 505385183731. The reversal of 505385183720 is 27381583505.

It can be written as a sum of positive squares in 4 ways, for example, as 496030038436 + 9355145284 = 704294^2 + 96722^2 .

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

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, 36509351 + ... + 36523190.

Almost surely, 2^505385183720 is an apocalyptic number.

It is an amenable number.

505385183720 is an abundant number, since it is smaller than the sum of its proper divisors (638304424000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

505385183720 is a wasteful number, since it uses less digits than its factorization.

505385183720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73032725 (or 73032721 counting only the distinct ones).

The product of its (nonzero) digits is 1008000, while the sum is 47.

The spelling of 505385183720 in words is "five hundred five billion, three hundred eighty-five million, one hundred eighty-three thousand, seven hundred twenty".