218886738671 has 2 divisors, whose sum is σ = 218886738672. Its totient is φ = 218886738670.

The previous prime is 218886738661. The next prime is 218886738703. The reversal of 218886738671 is 176837688812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218886738671 - 2²² = 218882544367 is a prime.

It is a super-2 number, since 2×218886738671² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 218886738598 and 218886738607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218886738661) 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, 109443369335 + 109443369336.

It is an arithmetic number, because the mean of its divisors is an integer number (109443369336).

Almost surely, 2^218886738671 is an apocalyptic number.

218886738671 is a deficient number, since it is larger than the sum of its proper divisors (1).

218886738671 is an equidigital number, since it uses as much as digits as its factorization.

218886738671 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43352064, while the sum is 65.

The spelling of 218886738671 in words is "two hundred eighteen billion, eight hundred eighty-six million, seven hundred thirty-eight thousand, six hundred seventy-one".