16886987365438 has 4 divisors (see below), whose sum is σ = 25330481048160. Its totient is φ = 8443493682718.

The previous prime is 16886987365399. The next prime is 16886987365459. The reversal of 16886987365438 is 83456378968861.

It is a semiprime because it is the product of two primes.

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, 4221746841358 + ... + 4221746841361.

It is an arithmetic number, because the mean of its divisors is an integer number (6332620262040).

Almost surely, 2^{16886987365438} is an apocalyptic number.

16886987365438 is a deficient number, since it is larger than the sum of its proper divisors (8443493682722).

16886987365438 is an equidigital number, since it uses as much as digits as its factorization.

16886987365438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8443493682721.

The product of its digits is 10032906240, while the sum is 82.

The spelling of 16886987365438 in words is "sixteen trillion, eight hundred eighty-six billion, nine hundred eighty-seven million, three hundred sixty-five thousand, four hundred thirty-eight".