505556416331 has 4 divisors (see below), whose sum is σ = 510030367032. Its totient is φ = 501082465632.

The previous prime is 505556416327. The next prime is 505556416361. The reversal of 505556416331 is 133614655505.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 505556416331 - 2² = 505556416327 is a prime.

It is a super-2 number, since 2×505556416331² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505556416361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2236975181 + ... + 2236975406.

It is an arithmetic number, because the mean of its divisors is an integer number (127507591758).

Almost surely, 2^505556416331 is an apocalyptic number.

505556416331 is a deficient number, since it is larger than the sum of its proper divisors (4473950701).

505556416331 is a wasteful number, since it uses less digits than its factorization.

505556416331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4473950700.

The product of its (nonzero) digits is 810000, while the sum is 44.

The spelling of 505556416331 in words is "five hundred five billion, five hundred fifty-six million, four hundred sixteen thousand, three hundred thirty-one".