16135095681 has 24 divisors (see below), whose sum is σ = 23372474216. Its totient is φ = 10726214400.

The previous prime is 16135095673. The next prime is 16135095689. The reversal of 16135095681 is 18659053161.

16135095681 is a `hidden beast` number, since 1 + 6 + 13 + 509 + 56 + 81 = 666.

It is an interprime number because it is at equal distance from previous prime (16135095673) and next prime (16135095689).

It can be written as a sum of positive squares in 4 ways, for example, as 9932115600 + 6202980081 = 99660^2 + 78759^2 .

It is not a de Polignac number, because 16135095681 - 2³ = 16135095673 is a prime.

It is a super-2 number, since 2×16135095681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16135095689) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7858251 + ... + 7860303.

Almost surely, 2^16135095681 is an apocalyptic number.

It is an amenable number.

16135095681 is a deficient number, since it is larger than the sum of its proper divisors (7237378535).

16135095681 is a wasteful number, since it uses less digits than its factorization.

16135095681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4113 (or 4110 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The spelling of 16135095681 in words is "sixteen billion, one hundred thirty-five million, ninety-five thousand, six hundred eighty-one".