218728310651 has 2 divisors, whose sum is σ = 218728310652. Its totient is φ = 218728310650.

The previous prime is 218728310639. The next prime is 218728310663. The reversal of 218728310651 is 156013827812.

It is a balanced prime because it is at equal distance from previous prime (218728310639) and next prime (218728310663).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218728310651 is a prime.

It is not a weakly prime, because it can be changed into another prime (218728310681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109364155325 + 109364155326.

It is an arithmetic number, because the mean of its divisors is an integer number (109364155326).

Almost surely, 2^218728310651 is an apocalyptic number.

218728310651 is a deficient number, since it is larger than the sum of its proper divisors (1).

218728310651 is an equidigital number, since it uses as much as digits as its factorization.

218728310651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 161280, while the sum is 44.

The spelling of 218728310651 in words is "two hundred eighteen billion, seven hundred twenty-eight million, three hundred ten thousand, six hundred fifty-one".