16783766780 has 48 divisors (see below), whose sum is σ = 38546172000. Its totient is φ = 6087936000.

The previous prime is 16783766771. The next prime is 16783766801. The reversal of 16783766780 is 8766738761.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6905 + ... + 183344.

It is an arithmetic number, because the mean of its divisors is an integer number (803045250).

Almost surely, 2^16783766780 is an apocalyptic number.

16783766780 is a gapful number since it is divisible by the number (10) 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 16783766780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19273086000).

16783766780 is an abundant number, since it is smaller than the sum of its proper divisors (21762405220).

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

16783766780 is a wasteful number, since it uses less digits than its factorization.

16783766780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190670 (or 190668 counting only the distinct ones).

The product of its (nonzero) digits is 14224896, while the sum is 59.

The spelling of 16783766780 in words is "sixteen billion, seven hundred eighty-three million, seven hundred sixty-six thousand, seven hundred eighty".