168213215647 has 2 divisors, whose sum is σ = 168213215648. Its totient is φ = 168213215646.

The previous prime is 168213215581. The next prime is 168213215671. The reversal of 168213215647 is 746512312861.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 168213215647 - 2³⁵ = 133853477279 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 168213215597 and 168213215606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (168213215047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84106607823 + 84106607824.

It is an arithmetic number, because the mean of its divisors is an integer number (84106607824).

Almost surely, 2^168213215647 is an apocalyptic number.

168213215647 is a deficient number, since it is larger than the sum of its proper divisors (1).

168213215647 is an equidigital number, since it uses as much as digits as its factorization.

168213215647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The spelling of 168213215647 in words is "one hundred sixty-eight billion, two hundred thirteen million, two hundred fifteen thousand, six hundred forty-seven".