17978320316 has 12 divisors (see below), whose sum is σ = 34322247960. Its totient is φ = 8171963760.

The previous prime is 17978320307. The next prime is 17978320333. The reversal of 17978320316 is 61302387971.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 204299051 + ... + 204299138.

It is an arithmetic number, because the mean of its divisors is an integer number (2860187330).

Almost surely, 2^17978320316 is an apocalyptic number.

It is an amenable number.

17978320316 is a deficient number, since it is larger than the sum of its proper divisors (16343927644).

17978320316 is a wasteful number, since it uses less digits than its factorization.

17978320316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408598204 (or 408598202 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 17978320316 in words is "seventeen billion, nine hundred seventy-eight million, three hundred twenty thousand, three hundred sixteen".