16782086881 has 16 divisors (see below), whose sum is σ = 19578256000. Its totient is φ = 14379274224.

The previous prime is 16782086869. The next prime is 16782086899. The reversal of 16782086881 is 18868028761.

It is a happy number.

It is not a de Polignac number, because 16782086881 - 2⁹ = 16782086369 is a prime.

It is a super-2 number, since 2×16782086881² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16782086801) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1110331 + ... + 1125343.

It is an arithmetic number, because the mean of its divisors is an integer number (1223641000).

Almost surely, 2^16782086881 is an apocalyptic number.

It is an amenable number.

16782086881 is a deficient number, since it is larger than the sum of its proper divisors (2796169119).

16782086881 is an equidigital number, since it uses as much as digits as its factorization.

16782086881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18293 (or 18279 counting only the distinct ones).

The product of its (nonzero) digits is 2064384, while the sum is 55.

The spelling of 16782086881 in words is "sixteen billion, seven hundred eighty-two million, eighty-six thousand, eight hundred eighty-one".