505364005565 has 8 divisors (see below), whose sum is σ = 642109560120. Its totient is φ = 380509368832.

The previous prime is 505364005561. The next prime is 505364005571. The reversal of 505364005565 is 565500463505.

It can be written as a sum of positive squares in 4 ways, for example, as 150542448004 + 354821557561 = 387998^2 + 595669^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 505364005565 - 2² = 505364005561 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505364005561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2972729360 + ... + 2972729529.

It is an arithmetic number, because the mean of its divisors is an integer number (80263695015).

Almost surely, 2^505364005565 is an apocalyptic number.

It is an amenable number.

505364005565 is a deficient number, since it is larger than the sum of its proper divisors (136745554555).

505364005565 is a wasteful number, since it uses less digits than its factorization.

505364005565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5945458911.

The product of its (nonzero) digits is 1350000, while the sum is 44.

The spelling of 505364005565 in words is "five hundred five billion, three hundred sixty-four million, five thousand, five hundred sixty-five".