780000000000 has 528 divisors, whose sum is σ = 2799316348920. Its totient is φ = 192000000000.

The previous prime is 779999999917. The next prime is 780000000023. The reversal of 780000000000 is 87.

780000000000 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a junction number, because it is equal to n+sod(n) for n = 779999999898 and 779999999907.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 13000 × 5000 × 12000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 43 ways as a sum of consecutive naturals, for example, 59999999994 + ... + 60000000006.

Almost surely, 2^780000000000 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 780000000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1399658174460).

780000000000 is an abundant number, since it is smaller than the sum of its proper divisors (2019316348920).

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

780000000000 is an frugal number, since it uses more digits than its factorization.

780000000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 56, while the sum is 15.

Adding to 780000000000 its reverse (87), we get a palindrome (780000000087).

The spelling of 780000000000 in words is "seven hundred eighty billion", and thus it is an aban number.