5664836861 has 2 divisors, whose sum is σ = 5664836862. Its totient is φ = 5664836860.

The previous prime is 5664836851. The next prime is 5664836867. The reversal of 5664836861 is 1686384665.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5331774361 + 333062500 = 73019^2 + 18250^2 .

It is a cyclic number.

It is not a de Polignac number, because 5664836861 - 2¹⁸ = 5664574717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5664836867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2832418430 + 2832418431.

It is an arithmetic number, because the mean of its divisors is an integer number (2832418431).

Almost surely, 2^5664836861 is an apocalyptic number.

It is an amenable number.

5664836861 is a deficient number, since it is larger than the sum of its proper divisors (1).

5664836861 is an equidigital number, since it uses as much as digits as its factorization.

5664836861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4976640, while the sum is 53.

The square root of 5664836861 is about 75265.1105160950. The cubic root of 5664836861 is about 1782.6351640432.

The spelling of 5664836861 in words is "five billion, six hundred sixty-four million, eight hundred thirty-six thousand, eight hundred sixty-one".