778987331712 has 896 divisors, whose sum is σ = 2575326600000. Its totient is φ = 233641304064.

The previous prime is 778987331701. The next prime is 778987331719. The reversal of 778987331712 is 217133789877.

It is a self number, because there is not a number n which added to its sum of digits gives 778987331712.

It is not an unprimeable number, because it can be changed into a prime (778987331719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 5604225339 + ... + 5604225477.

Almost surely, 2^778987331712 is an apocalyptic number.

778987331712 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 778987331712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1287663300000).

778987331712 is an abundant number, since it is smaller than the sum of its proper divisors (1796339268288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

778987331712 is a wasteful number, since it uses less digits than its factorization.

778987331712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 328 (or 301 counting only the distinct ones).

The product of its digits is 24893568, while the sum is 63.

The spelling of 778987331712 in words is "seven hundred seventy-eight billion, nine hundred eighty-seven million, three hundred thirty-one thousand, seven hundred twelve".