500247665561 has 4 divisors (see below), whose sum is σ = 571711617792. Its totient is φ = 428783713332.

The previous prime is 500247665521. The next prime is 500247665579. The reversal of 500247665561 is 165566742005.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 500247665561 - 2¹⁰ = 500247664537 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (500247665521) 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, 35731976105 + ... + 35731976118.

It is an arithmetic number, because the mean of its divisors is an integer number (142927904448).

Almost surely, 2^500247665561 is an apocalyptic number.

It is an amenable number.

500247665561 is a deficient number, since it is larger than the sum of its proper divisors (71463952231).

500247665561 is an equidigital number, since it uses as much as digits as its factorization.

500247665561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71463952230.

The product of its (nonzero) digits is 1512000, while the sum is 47.

The spelling of 500247665561 in words is "five hundred billion, two hundred forty-seven million, six hundred sixty-five thousand, five hundred sixty-one".