6506145641 has 2 divisors, whose sum is σ = 6506145642. Its totient is φ = 6506145640.

The previous prime is 6506145589. The next prime is 6506145647. The reversal of 6506145641 is 1465416056.

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., 5556211600 + 949934041 = 74540^2 + 30821^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6506145641 is a prime.

It is a super-2 number, since 2×6506145641² = 84659862203806601762, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6506145595 and 6506145604.

It is not a weakly prime, because it can be changed into another prime (6506145647) 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, 3253072820 + 3253072821.

It is an arithmetic number, because the mean of its divisors is an integer number (3253072821).

Almost surely, 2^6506145641 is an apocalyptic number.

It is an amenable number.

6506145641 is a deficient number, since it is larger than the sum of its proper divisors (1).

6506145641 is an equidigital number, since it uses as much as digits as its factorization.

6506145641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The square root of 6506145641 is about 80660.6821258040. The cubic root of 6506145641 is about 1866.8435642552.

The spelling of 6506145641 in words is "six billion, five hundred six million, one hundred forty-five thousand, six hundred forty-one".