505404521618 has 64 divisors (see below), whose sum is σ = 801907679232. Its totient is φ = 238641258240.

The previous prime is 505404521617. The next prime is 505404521669. The reversal of 505404521618 is 816125404505.

It is not an unprimeable number, because it can be changed into a prime (505404521617) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151181255 + ... + 151184597.

It is an arithmetic number, because the mean of its divisors is an integer number (12529807488).

Almost surely, 2^505404521618 is an apocalyptic number.

505404521618 is a deficient number, since it is larger than the sum of its proper divisors (296503157614).

505404521618 is a wasteful number, since it uses less digits than its factorization.

505404521618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3879.

The product of its (nonzero) digits is 192000, while the sum is 41.

The spelling of 505404521618 in words is "five hundred five billion, four hundred four million, five hundred twenty-one thousand, six hundred eighteen".