505545046645 has 16 divisors (see below), whose sum is σ = 608630216688. Its totient is φ = 403120488960.

The previous prime is 505545046547. The next prime is 505545046651. The reversal of 505545046645 is 546640545505.

It can be written as a sum of positive squares in 8 ways, for example, as 5242049604 + 500302997041 = 72402^2 + 707321^2 .

It is a de Polignac number, because none of the positive numbers 2^k-505545046645 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2032627 + ... + 2267743.

It is an arithmetic number, because the mean of its divisors is an integer number (38039388543).

Almost surely, 2^505545046645 is an apocalyptic number.

It is an amenable number.

505545046645 is a deficient number, since it is larger than the sum of its proper divisors (103085170043).

505545046645 is a wasteful number, since it uses less digits than its factorization.

505545046645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236520.

The product of its (nonzero) digits is 7200000, while the sum is 49.

The spelling of 505545046645 in words is "five hundred five billion, five hundred forty-five million, forty-six thousand, six hundred forty-five".