4539381861 has 16 divisors (see below), whose sum is σ = 7155676800. Its totient is φ = 2504486208.

The previous prime is 4539381859. The next prime is 4539381881. The reversal of 4539381861 is 1681839354.

It is not a de Polignac number, because 4539381861 - 2¹ = 4539381859 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4539381861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4539381851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3726306 + ... + 3727523.

It is an arithmetic number, because the mean of its divisors is an integer number (447229800).

Almost surely, 2^4539381861 is an apocalyptic number.

It is an amenable number.

4539381861 is a deficient number, since it is larger than the sum of its proper divisors (2616294939).

4539381861 is a wasteful number, since it uses less digits than its factorization.

4539381861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7453868.

The product of its digits is 622080, while the sum is 48.

The square root of 4539381861 is about 67374.9349610076. The cubic root of 4539381861 is about 1655.7657924366.

The spelling of 4539381861 in words is "four billion, five hundred thirty-nine million, three hundred eighty-one thousand, eight hundred sixty-one".