17678768648 has 36 divisors (see below), whose sum is σ = 34351321095. Its totient is φ = 8529312960.

The previous prime is 17678768647. The next prime is 17678768687. The reversal of 17678768648 is 84686787671.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in 5 ways, for example, as 13943358724 + 3735409924 = 118082^2 + 61118^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=94018.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17678768641) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 10905278 + ... + 10906898.

Almost surely, 2^17678768648 is an apocalyptic number.

It is an amenable number.

17678768648 is a deficient number, since it is larger than the sum of its proper divisors (16672552447).

17678768648 is an frugal number, since it uses more digits than its factorization.

17678768648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3306 (or 1652 counting only the distinct ones).

The product of its digits is 151732224, while the sum is 68.

The spelling of 17678768648 in words is "seventeen billion, six hundred seventy-eight million, seven hundred sixty-eight thousand, six hundred forty-eight".