649156828651946 has 16 divisors (see below), whose sum is σ = 994279002259464. Its totient is φ = 317795403757824.

The previous prime is 649156828651853. The next prime is 649156828651949.

649156828651946 is nontrivially palindromic in base 10.

649156828651946 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 391677545814025 + 257479282837921 = 19790845^2 + 16046161^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (649156828651949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16227277985 + ... + 16227317988.

Almost surely, 2^{649156828651946} is an apocalyptic number.

649156828651946 is a deficient number, since it is larger than the sum of its proper divisors (345122173607518).

649156828651946 is a wasteful number, since it uses less digits than its factorization.

649156828651946 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32454596185.

The product of its digits is 5374771200, while the sum is 80.

The spelling of 649156828651946 in words is "six hundred forty-nine trillion, one hundred fifty-six billion, eight hundred twenty-eight million, six hundred fifty-one thousand, nine hundred forty-six".