505006163491 has 16 divisors (see below), whose sum is σ = 529337001024. Its totient is φ = 480874054144.

The previous prime is 505006163489. The next prime is 505006163507. The reversal of 505006163491 is 194361600505.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 505006163491 - 2¹ = 505006163489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505006163591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40598925 + ... + 40611361.

It is an arithmetic number, because the mean of its divisors is an integer number (33083562564).

Almost surely, 2^505006163491 is an apocalyptic number.

505006163491 is a deficient number, since it is larger than the sum of its proper divisors (24330837533).

505006163491 is a wasteful number, since it uses less digits than its factorization.

505006163491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20270.

The product of its (nonzero) digits is 97200, while the sum is 40.

Adding to 505006163491 its reverse (194361600505), we get a palindrome (699367763996).

The spelling of 505006163491 in words is "five hundred five billion, six million, one hundred sixty-three thousand, four hundred ninety-one".