505444634161 has 4 divisors (see below), whose sum is σ = 505446242112. Its totient is φ = 505443026212.

The previous prime is 505444634147. The next prime is 505444634179. The reversal of 505444634161 is 161436444505.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 505444634161 - 2¹⁵ = 505444601393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505444634131) 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, 161125 + ... + 1018258.

It is an arithmetic number, because the mean of its divisors is an integer number (126361560528).

Almost surely, 2^505444634161 is an apocalyptic number.

It is an amenable number.

505444634161 is a deficient number, since it is larger than the sum of its proper divisors (1607951).

505444634161 is a wasteful number, since it uses less digits than its factorization.

505444634161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607950.

The product of its (nonzero) digits is 691200, while the sum is 43.

The spelling of 505444634161 in words is "five hundred five billion, four hundred forty-four million, six hundred thirty-four thousand, one hundred sixty-one".