8499216505123 has 2 divisors, whose sum is σ = 8499216505124. Its totient is φ = 8499216505122.

The previous prime is 8499216505097. The next prime is 8499216505159. The reversal of 8499216505123 is 3215056129948.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8499216505123 - 2²⁵ = 8499182950691 is a prime.

It is not a weakly prime, because it can be changed into another prime (8499216505193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4249608252561 + 4249608252562.

It is an arithmetic number, because the mean of its divisors is an integer number (4249608252562).

Almost surely, 2^{8499216505123} is an apocalyptic number.

8499216505123 is a deficient number, since it is larger than the sum of its proper divisors (1).

8499216505123 is an equidigital number, since it uses as much as digits as its factorization.

8499216505123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4665600, while the sum is 55.

The spelling of 8499216505123 in words is "eight trillion, four hundred ninety-nine billion, two hundred sixteen million, five hundred five thousand, one hundred twenty-three".