4609871318861 has 2 divisors, whose sum is σ = 4609871318862. Its totient is φ = 4609871318860.

The previous prime is 4609871318813. The next prime is 4609871318903. The reversal of 4609871318861 is 1688131789064.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2371002517636 + 2238868801225 = 1539806^2 + 1496285^2 .

It is a cyclic number.

It is not a de Polignac number, because 4609871318861 - 2³⁰ = 4608797577037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4609871318794 and 4609871318803.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4609871018861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2304935659430 + 2304935659431.

It is an arithmetic number, because the mean of its divisors is an integer number (2304935659431).

Almost surely, 2^{4609871318861} is an apocalyptic number.

It is an amenable number.

4609871318861 is a deficient number, since it is larger than the sum of its proper divisors (1).

4609871318861 is an equidigital number, since it uses as much as digits as its factorization.

4609871318861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13934592, while the sum is 62.

The spelling of 4609871318861 in words is "four trillion, six hundred nine billion, eight hundred seventy-one million, three hundred eighteen thousand, eight hundred sixty-one".