16686768780 has 324 divisors, whose sum is σ = 57684253536. Its totient is φ = 3901497600.

The previous prime is 16686768767. The next prime is 16686768811. The reversal of 16686768780 is 8786768661.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 18316525 + ... + 18317435.

Almost surely, 2^16686768780 is an apocalyptic number.

16686768780 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 16686768780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28842126768).

16686768780 is an abundant number, since it is smaller than the sum of its proper divisors (40997484756).

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

16686768780 is a wasteful number, since it uses less digits than its factorization.

16686768780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1006 (or 961 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 63.

The spelling of 16686768780 in words is "sixteen billion, six hundred eighty-six million, seven hundred sixty-eight thousand, seven hundred eighty".