505223445561 has 8 divisors (see below), whose sum is σ = 673757595840. Its totient is φ = 336752462832.

The previous prime is 505223445527. The next prime is 505223445581. The reversal of 505223445561 is 165544322505.

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

It is not a de Polignac number, because 505223445561 - 2¹⁴ = 505223429177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (505223445581) 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, 15773221 + ... + 15805218.

It is an arithmetic number, because the mean of its divisors is an integer number (84219699480).

Almost surely, 2^505223445561 is an apocalyptic number.

It is an amenable number.

505223445561 is a deficient number, since it is larger than the sum of its proper divisors (168534150279).

505223445561 is a wasteful number, since it uses less digits than its factorization.

505223445561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31583775.

The product of its (nonzero) digits is 720000, while the sum is 42.

The spelling of 505223445561 in words is "five hundred five billion, two hundred twenty-three million, four hundred forty-five thousand, five hundred sixty-one".