778812999983 has 2 divisors, whose sum is σ = 778812999984. Its totient is φ = 778812999982.

The previous prime is 778812999959. The next prime is 778813000013. The reversal of 778812999983 is 389999218877.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 778812999983 - 2¹⁶ = 778812934447 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 778812999898 and 778812999907.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (778812999383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389406499991 + 389406499992.

It is an arithmetic number, because the mean of its divisors is an integer number (389406499992).

Almost surely, 2^778812999983 is an apocalyptic number.

778812999983 is a deficient number, since it is larger than the sum of its proper divisors (1).

778812999983 is an equidigital number, since it uses as much as digits as its factorization.

778812999983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 987614208, while the sum is 80.

The spelling of 778812999983 in words is "seven hundred seventy-eight billion, eight hundred twelve million, nine hundred ninety-nine thousand, nine hundred eighty-three".