485661509 has 8 divisors (see below), whose sum is σ = 494243520. Its totient is φ = 477091296.

The previous prime is 485661503. The next prime is 485661511. The reversal of 485661509 is 905166584.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-485661509 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 485661509.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (485661503) 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, 138512 + ... + 141974.

It is an arithmetic number, because the mean of its divisors is an integer number (61780440).

Almost surely, 2^485661509 is an apocalyptic number.

It is an amenable number.

485661509 is a deficient number, since it is larger than the sum of its proper divisors (8582011).

485661509 is a wasteful number, since it uses less digits than its factorization.

485661509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5899.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 485661509 is about 22037.7292160513. The cubic root of 485661509 is about 786.0398455457.

The spelling of 485661509 in words is "four hundred eighty-five million, six hundred sixty-one thousand, five hundred nine".