16781402113 has 4 divisors (see below), whose sum is σ = 19178745280. Its totient is φ = 14384058948.

The previous prime is 16781402093. The next prime is 16781402173. The reversal of 16781402113 is 31120418761.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16781402113 - 2¹⁷ = 16781271041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16781402173) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1198671573 + ... + 1198671586.

It is an arithmetic number, because the mean of its divisors is an integer number (4794686320).

Almost surely, 2^16781402113 is an apocalyptic number.

It is an amenable number.

16781402113 is a deficient number, since it is larger than the sum of its proper divisors (2397343167).

16781402113 is an equidigital number, since it uses as much as digits as its factorization.

16781402113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2397343166.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 16781402113 in words is "sixteen billion, seven hundred eighty-one million, four hundred two thousand, one hundred thirteen".