650406641849 has 2 divisors, whose sum is σ = 650406641850. Its totient is φ = 650406641848.

The previous prime is 650406641827. The next prime is 650406641869. The reversal of 650406641849 is 948146604056.

650406641849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 335356810000 + 315049831849 = 579100^2 + 561293^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650406641849 is a prime.

It is a super-2 number, since 2×650406641849² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 650406641849.

It is not a weakly prime, because it can be changed into another prime (650406641809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325203320924 + 325203320925.

It is an arithmetic number, because the mean of its divisors is an integer number (325203320925).

Almost surely, 2^650406641849 is an apocalyptic number.

It is an amenable number.

650406641849 is a deficient number, since it is larger than the sum of its proper divisors (1).

650406641849 is an equidigital number, since it uses as much as digits as its factorization.

650406641849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4976640, while the sum is 53.

The spelling of 650406641849 in words is "six hundred fifty billion, four hundred six million, six hundred forty-one thousand, eight hundred forty-nine".