16787464789 has 4 divisors (see below), whose sum is σ = 16787763756. Its totient is φ = 16787165824.

The previous prime is 16787464777. The next prime is 16787464817. The reversal of 16787464789 is 98746478761.

16787464789 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5516032900 + 11271431889 = 74270^2 + 106167^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16787464789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16787462789) 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, 37084 + ... + 186949.

It is an arithmetic number, because the mean of its divisors is an integer number (4196940939).

Almost surely, 2^16787464789 is an apocalyptic number.

It is an amenable number.

16787464789 is a deficient number, since it is larger than the sum of its proper divisors (298967).

16787464789 is an equidigital number, since it uses as much as digits as its factorization.

16787464789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298966.

The product of its digits is 113799168, while the sum is 67.

The spelling of 16787464789 in words is "sixteen billion, seven hundred eighty-seven million, four hundred sixty-four thousand, seven hundred eighty-nine".