16978325788 has 6 divisors (see below), whose sum is σ = 29712070136. Its totient is φ = 8489162892.

The previous prime is 16978325773. The next prime is 16978325801. The reversal of 16978325788 is 88752387961.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2122290720 + ... + 2122290727.

Almost surely, 2^16978325788 is an apocalyptic number.

It is an amenable number.

16978325788 is a deficient number, since it is larger than the sum of its proper divisors (12733744348).

16978325788 is a wasteful number, since it uses less digits than its factorization.

16978325788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4244581451 (or 4244581449 counting only the distinct ones).

The product of its digits is 40642560, while the sum is 64.

The spelling of 16978325788 in words is "sixteen billion, nine hundred seventy-eight million, three hundred twenty-five thousand, seven hundred eighty-eight".