2943518561 has 2 divisors, whose sum is σ = 2943518562. Its totient is φ = 2943518560.

The previous prime is 2943518549. The next prime is 2943518563. The reversal of 2943518561 is 1658153492.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2550250000 + 393268561 = 50500^2 + 19831^2 .

It is a cyclic number.

It is not a de Polignac number, because 2943518561 - 2¹⁰ = 2943517537 is a prime.

Together with 2943518563, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2943518563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1471759280 + 1471759281.

It is an arithmetic number, because the mean of its divisors is an integer number (1471759281).

Almost surely, 2^2943518561 is an apocalyptic number.

It is an amenable number.

2943518561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2943518561 is an equidigital number, since it uses as much as digits as its factorization.

2943518561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 44.

The square root of 2943518561 is about 54254.2031643632. The cubic root of 2943518561 is about 1433.1410182875.

The spelling of 2943518561 in words is "two billion, nine hundred forty-three million, five hundred eighteen thousand, five hundred sixty-one".