505551650161 has 4 divisors (see below), whose sum is σ = 505566204400. Its totient is φ = 505537095924.

The previous prime is 505551650119. The next prime is 505551650209. The reversal of 505551650161 is 161056155505.

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 505551650161 - 2²⁹ = 505014779249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505551650101) 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, 7224891 + ... + 7294528.

It is an arithmetic number, because the mean of its divisors is an integer number (126391551100).

Almost surely, 2^505551650161 is an apocalyptic number.

It is an amenable number.

505551650161 is a deficient number, since it is larger than the sum of its proper divisors (14554239).

505551650161 is a wasteful number, since it uses less digits than its factorization.

505551650161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14554238.

The product of its (nonzero) digits is 112500, while the sum is 40.

The spelling of 505551650161 in words is "five hundred five billion, five hundred fifty-one million, six hundred fifty thousand, one hundred sixty-one".