16800977089 has 16 divisors (see below), whose sum is σ = 18578934864. Its totient is φ = 15094195200.

The previous prime is 16800977041. The next prime is 16800977111. The reversal of 16800977089 is 98077900861.

It can be written as a sum of positive squares in 8 ways, for example, as 13707726400 + 3093250689 = 117080^2 + 55617^2 .

It is a cyclic number.

It is not a de Polignac number, because 16800977089 - 2¹¹ = 16800975041 is a prime.

It is a super-2 number, since 2×16800977089² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16800977789) 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, 186957 + ... + 261829.

It is an arithmetic number, because the mean of its divisors is an integer number (1161183429).

Almost surely, 2^16800977089 is an apocalyptic number.

It is an amenable number.

16800977089 is a deficient number, since it is larger than the sum of its proper divisors (1777957775).

16800977089 is a wasteful number, since it uses less digits than its factorization.

16800977089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75348.

The product of its (nonzero) digits is 1524096, while the sum is 55.

The spelling of 16800977089 in words is "sixteen billion, eight hundred million, nine hundred seventy-seven thousand, eighty-nine".