16778026780 has 12 divisors (see below), whose sum is σ = 35233856280. Its totient is φ = 6711210704.

The previous prime is 16778026757. The next prime is 16778026787. The reversal of 16778026780 is 8762087761.

16778026780 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16778026787) 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 3 ways as a sum of consecutive naturals, for example, 419450650 + ... + 419450689.

It is an arithmetic number, because the mean of its divisors is an integer number (2936154690).

Almost surely, 2^16778026780 is an apocalyptic number.

16778026780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16778026780 is an abundant number, since it is smaller than the sum of its proper divisors (18455829500).

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

16778026780 is a wasteful number, since it uses less digits than its factorization.

16778026780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 838901348 (or 838901346 counting only the distinct ones).

The product of its (nonzero) digits is 1580544, while the sum is 52.

The spelling of 16778026780 in words is "sixteen billion, seven hundred seventy-eight million, twenty-six thousand, seven hundred eighty".