4518897649 has 12 divisors (see below), whose sum is σ = 5378927664. Its totient is φ = 3783261384.

The previous prime is 4518897631. The next prime is 4518897667. The reversal of 4518897649 is 9467988154.

It is an interprime number because it is at equal distance from previous prime (4518897631) and next prime (4518897667).

It is not a de Polignac number, because 4518897649 - 2⁷ = 4518897521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4518891649) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1070247 + ... + 1074460.

It is an arithmetic number, because the mean of its divisors is an integer number (448243972).

Almost surely, 2^4518897649 is an apocalyptic number.

4518897649 is a gapful number since it is divisible by the number (49) formed by its first and last digit.

It is an amenable number.

4518897649 is a deficient number, since it is larger than the sum of its proper divisors (860030015).

4518897649 is a wasteful number, since it uses less digits than its factorization.

4518897649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144764 (or 2144757 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The square root of 4518897649 is about 67222.7465148517. The cubic root of 4518897649 is about 1653.2714584521.

The spelling of 4518897649 in words is "four billion, five hundred eighteen million, eight hundred ninety-seven thousand, six hundred forty-nine".