649673552017 has 16 divisors (see below), whose sum is σ = 781597157760. Its totient is φ = 527530845312.

The previous prime is 649673551889. The next prime is 649673552081. The reversal of 649673552017 is 710255376946.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 649673552017 - 2⁷ = 649673551889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (649673553017) 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 in 15 ways as a sum of consecutive naturals, for example, 3261933 + ... + 3455365.

It is an arithmetic number, because the mean of its divisors is an integer number (48849822360).

Almost surely, 2^649673552017 is an apocalyptic number.

It is an amenable number.

649673552017 is a deficient number, since it is larger than the sum of its proper divisors (131923605743).

649673552017 is a wasteful number, since it uses less digits than its factorization.

649673552017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218712.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 649673552017 in words is "six hundred forty-nine billion, six hundred seventy-three million, five hundred fifty-two thousand, seventeen".