218014306457777 has 2 divisors, whose sum is σ = 218014306457778. Its totient is φ = 218014306457776.

The previous prime is 218014306457747. The next prime is 218014306457821. The reversal of 218014306457777 is 777754603410812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202468311306496 + 15545995151281 = 14229136^2 + 3942841^2 .

It is a cyclic number.

It is not a de Polignac number, because 218014306457777 - 2⁶ = 218014306457713 is a prime.

It is a super-2 number, since 2×218014306457777² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (218014306457747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109007153228888 + 109007153228889.

It is an arithmetic number, because the mean of its divisors is an integer number (109007153228889).

Almost surely, 2^{218014306457777} is an apocalyptic number.

It is an amenable number.

218014306457777 is a deficient number, since it is larger than the sum of its proper divisors (1).

218014306457777 is an equidigital number, since it uses as much as digits as its factorization.

218014306457777 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55319040, while the sum is 62.

The spelling of 218014306457777 in words is "two hundred eighteen trillion, fourteen billion, three hundred six million, four hundred fifty-seven thousand, seven hundred seventy-seven".