1824668861 has 2 divisors, whose sum is σ = 1824668862. Its totient is φ = 1824668860.

The previous prime is 1824668851. The next prime is 1824668863. The reversal of 1824668861 is 1688664281.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1706185636 + 118483225 = 41306^2 + 10885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1824668861 is a prime.

Together with 1824668863, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1824668863) 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, 912334430 + 912334431.

It is an arithmetic number, because the mean of its divisors is an integer number (912334431).

Almost surely, 2^1824668861 is an apocalyptic number.

It is an amenable number.

1824668861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1824668861 is an equidigital number, since it uses as much as digits as its factorization.

1824668861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 884736, while the sum is 50.

The square root of 1824668861 is about 42716.1428619205. The cubic root of 1824668861 is about 1221.9722781428.

The spelling of 1824668861 in words is "one billion, eight hundred twenty-four million, six hundred sixty-eight thousand, eight hundred sixty-one".