4855721609 has 4 divisors (see below), whose sum is σ = 4855938816. Its totient is φ = 4855504404.

The previous prime is 4855721599. The next prime is 4855721621. The reversal of 4855721609 is 9061275584.

It is a happy number.

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 4855721609 - 2⁴ = 4855721593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4855721009) 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, 70649 + ... + 121254.

It is an arithmetic number, because the mean of its divisors is an integer number (1213984704).

Almost surely, 2^4855721609 is an apocalyptic number.

It is an amenable number.

4855721609 is a deficient number, since it is larger than the sum of its proper divisors (217207).

4855721609 is a wasteful number, since it uses less digits than its factorization.

4855721609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217206.

The product of its (nonzero) digits is 604800, while the sum is 47.

The square root of 4855721609 is about 69683.0080363929. The cubic root of 4855721609 is about 1693.3676541970.

The spelling of 4855721609 in words is "four billion, eight hundred fifty-five million, seven hundred twenty-one thousand, six hundred nine".