17678478964 has 6 divisors (see below), whose sum is σ = 30937338194. Its totient is φ = 8839239480.

The previous prime is 17678478943. The next prime is 17678479001. The reversal of 17678478964 is 46987487671.

It can be written as a sum of positive squares in only one way, i.e., 14906456464 + 2772022500 = 122092^2 + 52650^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 17678478964.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2209809867 + ... + 2209809874.

Almost surely, 2^17678478964 is an apocalyptic number.

It is an amenable number.

17678478964 is a deficient number, since it is larger than the sum of its proper divisors (13258859230).

17678478964 is a wasteful number, since it uses less digits than its factorization.

17678478964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419619745 (or 4419619743 counting only the distinct ones).

The product of its digits is 113799168, while the sum is 67.

The spelling of 17678478964 in words is "seventeen billion, six hundred seventy-eight million, four hundred seventy-eight thousand, nine hundred sixty-four".