505818557073 has 48 divisors (see below), whose sum is σ = 803017103616. Its totient is φ = 305531205120.

The previous prime is 505818557063. The next prime is 505818557131. The reversal of 505818557073 is 370755818505.

505818557073 is a `hidden beast` number, since 5 + 0 + 5 + 8 + 18 + 557 + 0 + 73 = 666.

It is not a de Polignac number, because 505818557073 - 2¹⁰ = 505818556049 is a prime.

It is a super-5 number, since 5×505818557073⁵ (a number of 60 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (505818557063) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 137911 + ... + 1015212.

It is an arithmetic number, because the mean of its divisors is an integer number (16729522992).

Almost surely, 2^505818557073 is an apocalyptic number.

It is an amenable number.

505818557073 is a deficient number, since it is larger than the sum of its proper divisors (297198546543).

505818557073 is a wasteful number, since it uses less digits than its factorization.

505818557073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153254 (or 1153251 counting only the distinct ones).

The product of its (nonzero) digits is 5880000, while the sum is 54.

The spelling of 505818557073 in words is "five hundred five billion, eight hundred eighteen million, five hundred fifty-seven thousand, seventy-three".