649156828651853 has 2 divisors, whose sum is σ = 649156828651854. Its totient is φ = 649156828651852.

The previous prime is 649156828651841. The next prime is 649156828651949. The reversal of 649156828651853 is 358156828651946.

It is a happy number.

649156828651853 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 558286022717929 + 90870805933924 = 23628077^2 + 9532618^2 .

It is a cyclic number.

It is not a de Polignac number, because 649156828651853 - 2³⁶ = 649088109175117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (649156828651823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 324578414325926 + 324578414325927.

It is an arithmetic number, because the mean of its divisors is an integer number (324578414325927).

Almost surely, 2^{649156828651853} is an apocalyptic number.

It is an amenable number.

649156828651853 is a deficient number, since it is larger than the sum of its proper divisors (1).

649156828651853 is an equidigital number, since it uses as much as digits as its factorization.

649156828651853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2985984000, while the sum is 77.

The spelling of 649156828651853 in words is "six hundred forty-nine trillion, one hundred fifty-six billion, eight hundred twenty-eight million, six hundred fifty-one thousand, eight hundred fifty-three".