8216634481637 has 2 divisors, whose sum is σ = 8216634481638. Its totient is φ = 8216634481636.

The previous prime is 8216634481591. The next prime is 8216634481739. The reversal of 8216634481637 is 7361844366128.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5296469576836 + 2920164904801 = 2301406^2 + 1708849^2 .

It is a cyclic number.

It is not a de Polignac number, because 8216634481637 - 2²⁸ = 8216366046181 is a prime.

It is a super-2 number, since 2×8216634481637² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8216634483637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4108317240818 + 4108317240819.

It is an arithmetic number, because the mean of its divisors is an integer number (4108317240819).

Almost surely, 2^{8216634481637} is an apocalyptic number.

It is an amenable number.

8216634481637 is a deficient number, since it is larger than the sum of its proper divisors (1).

8216634481637 is an equidigital number, since it uses as much as digits as its factorization.

8216634481637 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27869184, while the sum is 59.

The spelling of 8216634481637 in words is "eight trillion, two hundred sixteen billion, six hundred thirty-four million, four hundred eighty-one thousand, six hundred thirty-seven".