16944531649 has 2 divisors, whose sum is σ = 16944531650. Its totient is φ = 16944531648.

The previous prime is 16944531623. The next prime is 16944531677. The reversal of 16944531649 is 94613544961.

16944531649 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., 14398320049 + 2546211600 = 119993^2 + 50460^2 .

It is a cyclic number.

It is not a de Polignac number, because 16944531649 - 2²³ = 16936143041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16944531596 and 16944531605.

It is not a weakly prime, because it can be changed into another prime (16944531679) 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, 8472265824 + 8472265825.

It is an arithmetic number, because the mean of its divisors is an integer number (8472265825).

Almost surely, 2^16944531649 is an apocalyptic number.

It is an amenable number.

16944531649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16944531649 is an equidigital number, since it uses as much as digits as its factorization.

16944531649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2799360, while the sum is 52.

The spelling of 16944531649 in words is "sixteen billion, nine hundred forty-four million, five hundred thirty-one thousand, six hundred forty-nine".