16757635681 has 4 divisors (see below), whose sum is σ = 16864372372. Its totient is φ = 16650898992.

The previous prime is 16757635667. The next prime is 16757635717. The reversal of 16757635681 is 18653675761.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18653675761 = 7 ⋅2664810823.

It can be written as a sum of positive squares in 2 ways, for example, as 2035453456 + 14722182225 = 45116^2 + 121335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16757635681 is a prime.

It is a super-2 number, since 2×16757635681² (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 (16757633681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53368110 + ... + 53368423.

It is an arithmetic number, because the mean of its divisors is an integer number (4216093093).

Almost surely, 2^16757635681 is an apocalyptic number.

It is an amenable number.

16757635681 is a deficient number, since it is larger than the sum of its proper divisors (106736691).

16757635681 is a wasteful number, since it uses less digits than its factorization.

16757635681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106736690.

The product of its digits is 6350400, while the sum is 55.

The spelling of 16757635681 in words is "sixteen billion, seven hundred fifty-seven million, six hundred thirty-five thousand, six hundred eighty-one".