778812999382 has 16 divisors (see below), whose sum is σ = 1298466958032. Its totient is φ = 347326551520.

The previous prime is 778812999373. The next prime is 778812999383. The reversal of 778812999382 is 283999218877.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a 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 in 7 ways as a sum of consecutive naturals, for example, 333966673 + ... + 333969004.

It is an arithmetic number, because the mean of its divisors is an integer number (81154184877).

Almost surely, 2^778812999382 is an apocalyptic number.

778812999382 is a deficient number, since it is larger than the sum of its proper divisors (519653958650).

778812999382 is a wasteful number, since it uses less digits than its factorization.

778812999382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 667935743.

The product of its digits is 219469824, while the sum is 73.

The spelling of 778812999382 in words is "seven hundred seventy-eight billion, eight hundred twelve million, nine hundred ninety-nine thousand, three hundred eighty-two".