4468648646889 has 36 divisors (see below), whose sum is σ = 7650216398916. Its totient is φ = 2505333999168.

The previous prime is 4468648646863. The next prime is 4468648646897. The reversal of 4468648646889 is 9886468468644.

It can be written as a sum of positive squares in 2 ways, for example, as 3689983590489 + 778665056400 = 1920933^2 + 882420^2 .

It is a de Polignac number, because none of the positive numbers 2^k-4468648646889 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4468648646089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 95570874 + ... + 95617619.

It is an arithmetic number, because the mean of its divisors is an integer number (212506011081).

Almost surely, 2^{4468648646889} is an apocalyptic number.

4468648646889 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4468648646889 is a deficient number, since it is larger than the sum of its proper divisors (3181567752027).

4468648646889 is a wasteful number, since it uses less digits than its factorization.

4468648646889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191188566 (or 191188556 counting only the distinct ones).

The product of its digits is 12230590464, while the sum is 81.

The spelling of 4468648646889 in words is "four trillion, four hundred sixty-eight billion, six hundred forty-eight million, six hundred forty-six thousand, eight hundred eighty-nine".