505406165644 has 6 divisors (see below), whose sum is σ = 884460789884. Its totient is φ = 252703082820.

The previous prime is 505406165603. The next prime is 505406165651. The reversal of 505406165644 is 446561604505.

It is a junction number, because it is equal to n+sod(n) for n = 505406165594 and 505406165603.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63175770702 + ... + 63175770709.

Almost surely, 2^505406165644 is an apocalyptic number.

It is an amenable number.

505406165644 is a deficient number, since it is larger than the sum of its proper divisors (379054624240).

505406165644 is a wasteful number, since it uses less digits than its factorization.

505406165644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126351541415 (or 126351541413 counting only the distinct ones).

The product of its (nonzero) digits is 1728000, while the sum is 46.

The spelling of 505406165644 in words is "five hundred five billion, four hundred six million, one hundred sixty-five thousand, six hundred forty-four".