7980816499 has 2 divisors, whose sum is σ = 7980816500. Its totient is φ = 7980816498.

The previous prime is 7980816497. The next prime is 7980816509. The reversal of 7980816499 is 9946180897.

It is a weak prime.

It is an emirp because it is prime and its reverse (9946180897) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7980816499 - 2¹ = 7980816497 is a prime.

Together with 7980816497, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (7980816497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3990408249 + 3990408250.

It is an arithmetic number, because the mean of its divisors is an integer number (3990408250).

Almost surely, 2^7980816499 is an apocalyptic number.

7980816499 is a deficient number, since it is larger than the sum of its proper divisors (1).

7980816499 is an equidigital number, since it uses as much as digits as its factorization.

7980816499 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7838208, while the sum is 61.

The square root of 7980816499 is about 89335.4157039637. The cubic root of 7980816499 is about 1998.4000954106.

The spelling of 7980816499 in words is "seven billion, nine hundred eighty million, eight hundred sixteen thousand, four hundred ninety-nine".