4809561361 has 6 divisors (see below), whose sum is σ = 5286542786. Its totient is φ = 4372328400.

The previous prime is 4809561359. The next prime is 4809561397. The reversal of 4809561361 is 1631659084.

It can be written as a sum of positive squares in only one way, i.e., 4325561361 + 484000000 = 65769^2 + 22000^2 .

It is not a de Polignac number, because 4809561361 - 2¹ = 4809561359 is a prime.

It is a super-3 number, since 3×4809561361³ (a number of 30 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4809561311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19874100 + ... + 19874341.

Almost surely, 2^4809561361 is an apocalyptic number.

It is an amenable number.

4809561361 is a deficient number, since it is larger than the sum of its proper divisors (476981425).

4809561361 is a wasteful number, since it uses less digits than its factorization.

4809561361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39748463 (or 39748452 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 43.

The square root of 4809561361 is about 69351.0011535522. The cubic root of 4809561361 is about 1687.9846383127.

The spelling of 4809561361 in words is "four billion, eight hundred nine million, five hundred sixty-one thousand, three hundred sixty-one".