18199996998216 has 32 divisors (see below), whose sum is σ = 49636355450400. Its totient is φ = 5515150605440.

The previous prime is 18199996998179. The next prime is 18199996998233. The reversal of 18199996998216 is 61289969999181.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34469691021 + ... + 34469691548.

It is an arithmetic number, because the mean of its divisors is an integer number (1551136107825).

Almost surely, 2^{18199996998216} is an apocalyptic number.

It is an amenable number.

18199996998216 is an abundant number, since it is smaller than the sum of its proper divisors (31436358452184).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18199996998216 is a wasteful number, since it uses less digits than its factorization.

18199996998216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68939382589 (or 68939382585 counting only the distinct ones).

The product of its digits is 2448880128, while the sum is 87.

The spelling of 18199996998216 in words is "eighteen trillion, one hundred ninety-nine billion, nine hundred ninety-six million, nine hundred ninety-eight thousand, two hundred sixteen".