16709511779 has 4 divisors (see below), whose sum is σ = 17248528320. Its totient is φ = 16170495240.

The previous prime is 16709511737. The next prime is 16709511781. The reversal of 16709511779 is 97711590761.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16709511779 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16709511779.

It is not an unprimeable number, because it can be changed into a prime (16709511079) 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, 269508224 + ... + 269508285.

It is an arithmetic number, because the mean of its divisors is an integer number (4312132080).

Almost surely, 2^16709511779 is an apocalyptic number.

16709511779 is a deficient number, since it is larger than the sum of its proper divisors (539016541).

16709511779 is an equidigital number, since it uses as much as digits as its factorization.

16709511779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 539016540.

The product of its (nonzero) digits is 833490, while the sum is 53.

The spelling of 16709511779 in words is "sixteen billion, seven hundred nine million, five hundred eleven thousand, seven hundred seventy-nine".