505251255361 has 4 divisors (see below), whose sum is σ = 505254307924. Its totient is φ = 505248202800.

The previous prime is 505251255359. The next prime is 505251255367. The reversal of 505251255361 is 163552152505.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 366509160000 + 138742095361 = 605400^2 + 372481^2 .

It is a cyclic number.

It is not a de Polignac number, because 505251255361 - 2¹ = 505251255359 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (505251255367) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1262850 + ... + 1614091.

It is an arithmetic number, because the mean of its divisors is an integer number (126313576981).

Almost surely, 2^505251255361 is an apocalyptic number.

It is an amenable number.

505251255361 is a deficient number, since it is larger than the sum of its proper divisors (3052563).

505251255361 is a wasteful number, since it uses less digits than its factorization.

505251255361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3052562.

The product of its (nonzero) digits is 225000, while the sum is 40.

The spelling of 505251255361 in words is "five hundred five billion, two hundred fifty-one million, two hundred fifty-five thousand, three hundred sixty-one".