16708344857 has 4 divisors (see below), whose sum is σ = 16873774116. Its totient is φ = 16542915600.

The previous prime is 16708344833. The next prime is 16708344881. The reversal of 16708344857 is 75844380761.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (16708344833) and next prime (16708344881).

It can be written as a sum of positive squares in 2 ways, for example, as 15198944656 + 1509400201 = 123284^2 + 38851^2 .

It is a cyclic number.

It is not a de Polignac number, because 16708344857 - 2¹⁰ = 16708343833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 16708344799 and 16708344808.

It is not an unprimeable number, because it can be changed into a prime (16708346857) 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, 82714478 + ... + 82714679.

It is an arithmetic number, because the mean of its divisors is an integer number (4218443529).

Almost surely, 2^16708344857 is an apocalyptic number.

It is an amenable number.

16708344857 is a deficient number, since it is larger than the sum of its proper divisors (165429259).

16708344857 is a wasteful number, since it uses less digits than its factorization.

16708344857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165429258.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 16708344857 in words is "sixteen billion, seven hundred eight million, three hundred forty-four thousand, eight hundred fifty-seven".