16695844859661 has 16 divisors (see below), whose sum is σ = 24617534640960. Its totient is φ = 9980081608320.

The previous prime is 16695844859587. The next prime is 16695844859663.

16695844859661 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 16695844859661 - 2⁹ = 16695844859149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16695844859663) 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, 3465303706 + ... + 3465308523.

It is an arithmetic number, because the mean of its divisors is an integer number (1538595915060).

Almost surely, 2^{16695844859661} is an apocalyptic number.

16695844859661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16695844859661 is a deficient number, since it is larger than the sum of its proper divisors (7921689781299).

16695844859661 is a wasteful number, since it uses less digits than its factorization.

16695844859661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6930612316.

The product of its digits is 2687385600, while the sum is 78.

The spelling of 16695844859661 in words is "sixteen trillion, six hundred ninety-five billion, eight hundred forty-four million, eight hundred fifty-nine thousand, six hundred sixty-one".