2611564243 has 2 divisors, whose sum is σ = 2611564244. Its totient is φ = 2611564242.

The previous prime is 2611564237. The next prime is 2611564283. The reversal of 2611564243 is 3424651162.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2611564243 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2611564199 and 2611564208.

It is not a weakly prime, because it can be changed into another prime (2611564223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1305782121 + 1305782122.

It is an arithmetic number, because the mean of its divisors is an integer number (1305782122).

Almost surely, 2^2611564243 is an apocalyptic number.

2611564243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2611564243 is an equidigital number, since it uses as much as digits as its factorization.

2611564243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 2611564243 is about 51103.4660566189. The cubic root of 2611564243 is about 1377.1045225769.

The spelling of 2611564243 in words is "two billion, six hundred eleven million, five hundred sixty-four thousand, two hundred forty-three".