6490649069 has 2 divisors, whose sum is σ = 6490649070. Its totient is φ = 6490649068.

The previous prime is 6490649041. The next prime is 6490649111. The reversal of 6490649069 is 9609460946.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4049795044 + 2440854025 = 63638^2 + 49405^2 .

It is a cyclic number.

It is not a de Polignac number, because 6490649069 - 2¹² = 6490644973 is a prime.

It is a super-2 number, since 2×6490649069² = 84257050673821133522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 6490649069.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6490649969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245324534 + 3245324535.

It is an arithmetic number, because the mean of its divisors is an integer number (3245324535).

Almost surely, 2^6490649069 is an apocalyptic number.

It is an amenable number.

6490649069 is a deficient number, since it is larger than the sum of its proper divisors (1).

6490649069 is an equidigital number, since it uses as much as digits as its factorization.

6490649069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2519424, while the sum is 53.

The square root of 6490649069 is about 80564.5645988359. The cubic root of 6490649069 is about 1865.3602141876.

The spelling of 6490649069 in words is "six billion, four hundred ninety million, six hundred forty-nine thousand, sixty-nine".