609648861 has 8 divisors (see below), whose sum is σ = 822659040. Its totient is φ = 401535632.

The previous prime is 609648859. The next prime is 609648869. The reversal of 609648861 is 168846906.

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 609648861 - 2¹ = 609648859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 609648861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (609648869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1223946 + ... + 1224443.

It is an arithmetic number, because the mean of its divisors is an integer number (102832380).

Almost surely, 2^609648861 is an apocalyptic number.

It is an amenable number.

609648861 is a deficient number, since it is larger than the sum of its proper divisors (213010179).

609648861 is a wasteful number, since it uses less digits than its factorization.

609648861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448475.

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 609648861 is about 24691.0684458976. The cubic root of 609648861 is about 847.9298462531.

The spelling of 609648861 in words is "six hundred nine million, six hundred forty-eight thousand, eight hundred sixty-one".