778904000000 has 420 divisors, whose sum is σ = 2264077816308. Its totient is φ = 266918400000.

The previous prime is 778903999999. The next prime is 778904000003. The reversal of 778904000000 is 409877.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a taxicab number since it can be written as a sum of two cubes in more than one way. Here 778904000000 = 600³ + 9200³ = 3825³ + 8975³.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (778904000003) by changing a digit.

It is a polite number, since it can be written in 41 ways as a sum of consecutive naturals, for example, 391999007 + ... + 392000993.

Almost surely, 2^778904000000 is an apocalyptic number.

778904000000 is a gapful number since it is divisible by the number (70) 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 778904000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1132038908154).

778904000000 is an abundant number, since it is smaller than the sum of its proper divisors (1485173816308).

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

778904000000 is an frugal number, since it uses more digits than its factorization.

778904000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2049 (or 2001 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 35.

Adding to 778904000000 its reverse (409877), we get a palindrome (778904409877).

The spelling of 778904000000 in words is "seven hundred seventy-eight billion, nine hundred four million", and thus it is an aban number.