4509804861 has 12 divisors (see below), whose sum is σ = 6538934688. Its totient is φ = 2995103304.

The previous prime is 4509804853. The next prime is 4509804883. The reversal of 4509804861 is 1684089054.

4509804861 is a `hidden beast` number, since 4 + 509 + 80 + 4 + 8 + 61 = 666.

It is not a de Polignac number, because 4509804861 - 2³ = 4509804853 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4509804161) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 950275 + ... + 955008.

It is an arithmetic number, because the mean of its divisors is an integer number (544911224).

Almost surely, 2^4509804861 is an apocalyptic number.

It is an amenable number.

4509804861 is a deficient number, since it is larger than the sum of its proper divisors (2029129827).

4509804861 is a wasteful number, since it uses less digits than its factorization.

4509804861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1905552 (or 1905549 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The square root of 4509804861 is about 67155.0806789777. The cubic root of 4509804861 is about 1652.1618263979.

The spelling of 4509804861 in words is "four billion, five hundred nine million, eight hundred four thousand, eight hundred sixty-one".