649663366947 has 32 divisors (see below), whose sum is σ = 994677926400. Its totient is φ = 369472396800.

The previous prime is 649663366927. The next prime is 649663366973. The reversal of 649663366947 is 749663366946.

It is not a de Polignac number, because 649663366947 - 2⁶ = 649663366883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (649663366927) 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 31 ways as a sum of consecutive naturals, for example, 3643429 + ... + 3817577.

It is an arithmetic number, because the mean of its divisors is an integer number (31083685200).

Almost surely, 2^649663366947 is an apocalyptic number.

649663366947 is a deficient number, since it is larger than the sum of its proper divisors (345014559453).

649663366947 is a wasteful number, since it uses less digits than its factorization.

649663366947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175003.

The product of its digits is 634894848, while the sum is 69.

Subtracting 649663366947 from its reverse (749663366946), we obtain a palindrome (99999999999).

The spelling of 649663366947 in words is "six hundred forty-nine billion, six hundred sixty-three million, three hundred sixty-six thousand, nine hundred forty-seven".