218251436770673 has 2 divisors, whose sum is σ = 218251436770674. Its totient is φ = 218251436770672.

The previous prime is 218251436770621. The next prime is 218251436770691. The reversal of 218251436770673 is 376077634152812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 204439867273009 + 13811569497664 = 14298247^2 + 3716392^2 .

It is a cyclic number.

It is not a de Polignac number, because 218251436770673 - 2²² = 218251432576369 is a prime.

It is not a weakly prime, because it can be changed into another prime (218251436778673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109125718385336 + 109125718385337.

It is an arithmetic number, because the mean of its divisors is an integer number (109125718385337).

Almost surely, 2^{218251436770673} is an apocalyptic number.

It is an amenable number.

218251436770673 is a deficient number, since it is larger than the sum of its proper divisors (1).

218251436770673 is an equidigital number, since it uses as much as digits as its factorization.

218251436770673 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71124480, while the sum is 62.

The spelling of 218251436770673 in words is "two hundred eighteen trillion, two hundred fifty-one billion, four hundred thirty-six million, seven hundred seventy thousand, six hundred seventy-three".