16648901761 has 2 divisors, whose sum is σ = 16648901762. Its totient is φ = 16648901760.

The previous prime is 16648901749. The next prime is 16648901833. The reversal of 16648901761 is 16710984661.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12181316161 + 4467585600 = 110369^2 + 66840^2 .

It is a cyclic number.

It is not a de Polignac number, because 16648901761 - 2¹¹ = 16648899713 is a prime.

It is a super-2 number, since 2×16648901761² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (16648901701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8324450880 + 8324450881.

It is an arithmetic number, because the mean of its divisors is an integer number (8324450881).

Almost surely, 2^16648901761 is an apocalyptic number.

It is an amenable number.

16648901761 is a deficient number, since it is larger than the sum of its proper divisors (1).

16648901761 is an equidigital number, since it uses as much as digits as its factorization.

16648901761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 435456, while the sum is 49.

The spelling of 16648901761 in words is "sixteen billion, six hundred forty-eight million, nine hundred one thousand, seven hundred sixty-one".