16765783081 has 2 divisors, whose sum is σ = 16765783082. Its totient is φ = 16765783080.

The previous prime is 16765783051. The next prime is 16765783127. The reversal of 16765783081 is 18038756761.

16765783081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16759632681 + 6150400 = 129459^2 + 2480^2 .

It is a cyclic number.

It is not a de Polignac number, because 16765783081 - 2⁹ = 16765782569 is a prime.

It is a super-2 number, since 2×16765783081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16765783051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8382891540 + 8382891541.

It is an arithmetic number, because the mean of its divisors is an integer number (8382891541).

Almost surely, 2^16765783081 is an apocalyptic number.

It is an amenable number.

16765783081 is a deficient number, since it is larger than the sum of its proper divisors (1).

16765783081 is an equidigital number, since it uses as much as digits as its factorization.

16765783081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 16765783081 in words is "sixteen billion, seven hundred sixty-five million, seven hundred eighty-three thousand, eighty-one".