16590195649 has 2 divisors, whose sum is σ = 16590195650. Its totient is φ = 16590195648.

The previous prime is 16590195593. The next prime is 16590195653. The reversal of 16590195649 is 94659109561.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16433445249 + 156750400 = 128193^2 + 12520^2 .

It is a cyclic number.

It is not a de Polignac number, because 16590195649 - 2¹⁵ = 16590162881 is a prime.

It is a super-3 number, since 3×16590195649³ (a number of 32 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16590195649.

It is not a weakly prime, because it can be changed into another prime (16590195949) 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 as a sum of consecutive naturals, namely, 8295097824 + 8295097825.

It is an arithmetic number, because the mean of its divisors is an integer number (8295097825).

Almost surely, 2^16590195649 is an apocalyptic number.

It is an amenable number.

16590195649 is a deficient number, since it is larger than the sum of its proper divisors (1).

16590195649 is an equidigital number, since it uses as much as digits as its factorization.

16590195649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 16590195649 in words is "sixteen billion, five hundred ninety million, one hundred ninety-five thousand, six hundred forty-nine".