78005280851 has 2 divisors, whose sum is σ = 78005280852. Its totient is φ = 78005280850.

The previous prime is 78005280809. The next prime is 78005280853. The reversal of 78005280851 is 15808250087.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 78005280851 - 2¹⁰ = 78005279827 is a prime.

It is a Sophie Germain prime.

Together with 78005280853, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (78005280853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39002640425 + 39002640426.

It is an arithmetic number, because the mean of its divisors is an integer number (39002640426).

Almost surely, 2^78005280851 is an apocalyptic number.

78005280851 is a deficient number, since it is larger than the sum of its proper divisors (1).

78005280851 is an equidigital number, since it uses as much as digits as its factorization.

78005280851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 179200, while the sum is 44.

The spelling of 78005280851 in words is "seventy-eight billion, five million, two hundred eighty thousand, eight hundred fifty-one".