505240545263 has 4 divisors (see below), whose sum is σ = 505499512128. Its totient is φ = 504981578400.

The previous prime is 505240545259. The next prime is 505240545269. The reversal of 505240545263 is 362545042505.

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

It is a cyclic number.

It is not a de Polignac number, because 505240545263 - 2² = 505240545259 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 505240545263.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (505240545269) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 129480506 + ... + 129484407.

It is an arithmetic number, because the mean of its divisors is an integer number (126374878032).

Almost surely, 2^505240545263 is an apocalyptic number.

505240545263 is a deficient number, since it is larger than the sum of its proper divisors (258966865).

505240545263 is a wasteful number, since it uses less digits than its factorization.

505240545263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258966864.

The product of its (nonzero) digits is 720000, while the sum is 41.

Adding to 505240545263 its reverse (362545042505), we get a palindrome (867785587768).

The spelling of 505240545263 in words is "five hundred five billion, two hundred forty million, five hundred forty-five thousand, two hundred sixty-three".