218347867064653 has 2 divisors, whose sum is σ = 218347867064654. Its totient is φ = 218347867064652.

The previous prime is 218347867064611. The next prime is 218347867064669. The reversal of 218347867064653 is 356460768743812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 187361699888169 + 30986167176484 = 13688013^2 + 5566522^2 .

It is a cyclic number.

It is not a de Polignac number, because 218347867064653 - 2³³ = 218339277130061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218347867064693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109173933532326 + 109173933532327.

It is an arithmetic number, because the mean of its divisors is an integer number (109173933532327).

Almost surely, 2^{218347867064653} is an apocalyptic number.

It is an amenable number.

218347867064653 is a deficient number, since it is larger than the sum of its proper divisors (1).

218347867064653 is an equidigital number, since it uses as much as digits as its factorization.

218347867064653 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 975421440, while the sum is 70.

The spelling of 218347867064653 in words is "two hundred eighteen trillion, three hundred forty-seven billion, eight hundred sixty-seven million, sixty-four thousand, six hundred fifty-three".