16784412681 has 16 divisors (see below), whose sum is σ = 23702995008. Its totient is φ = 10528128000.

The previous prime is 16784412649. The next prime is 16784412683. The reversal of 16784412681 is 18621448761.

It is not a de Polignac number, because 16784412681 - 2⁵ = 16784412649 is a prime.

It is a super-2 number, since 2×16784412681² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16784412681.

It is not an unprimeable number, because it can be changed into a prime (16784412683) 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, 120481 + ... + 219281.

It is an arithmetic number, because the mean of its divisors is an integer number (1481437188).

Almost surely, 2^16784412681 is an apocalyptic number.

It is an amenable number.

16784412681 is a deficient number, since it is larger than the sum of its proper divisors (6918582327).

16784412681 is a wasteful number, since it uses less digits than its factorization.

16784412681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102152.

The product of its digits is 516096, while the sum is 48.

The spelling of 16784412681 in words is "sixteen billion, seven hundred eighty-four million, four hundred twelve thousand, six hundred eighty-one".