4718118572561 has 2 divisors, whose sum is σ = 4718118572562. Its totient is φ = 4718118572560.

The previous prime is 4718118572467. The next prime is 4718118572567. The reversal of 4718118572561 is 1652758118174.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2674062185536 + 2044056387025 = 1635256^2 + 1429705^2 .

It is a cyclic number.

It is not a de Polignac number, because 4718118572561 - 2³⁰ = 4717044830737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 4718118572497 and 4718118572506.

It is not a weakly prime, because it can be changed into another prime (4718118572567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2359059286280 + 2359059286281.

It is an arithmetic number, because the mean of its divisors is an integer number (2359059286281).

Almost surely, 2^{4718118572561} is an apocalyptic number.

It is an amenable number.

4718118572561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4718118572561 is an equidigital number, since it uses as much as digits as its factorization.

4718118572561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3763200, while the sum is 56.

The spelling of 4718118572561 in words is "four trillion, seven hundred eighteen billion, one hundred eighteen million, five hundred seventy-two thousand, five hundred sixty-one".