8216178238937 has 2 divisors, whose sum is σ = 8216178238938. Its totient is φ = 8216178238936.

The previous prime is 8216178238921. The next prime is 8216178239033. The reversal of 8216178238937 is 7398328716128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6126595238416 + 2089583000521 = 2475196^2 + 1445539^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216178238937 - 2⁴ = 8216178238921 is a prime.

It is not a weakly prime, because it can be changed into another prime (8216178238907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108089119468 + 4108089119469.

It is an arithmetic number, because the mean of its divisors is an integer number (4108089119469).

Almost surely, 2^{8216178238937} is an apocalyptic number.

It is an amenable number.

8216178238937 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216178238937 is an equidigital number, since it uses as much as digits as its factorization.

8216178238937 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48771072, while the sum is 65.

The spelling of 8216178238937 in words is "eight trillion, two hundred sixteen billion, one hundred seventy-eight million, two hundred thirty-eight thousand, nine hundred thirty-seven".