16638853663627 has 16 divisors (see below), whose sum is σ = 17977812330240. Its totient is φ = 15308412511392.

The previous prime is 16638853663583. The next prime is 16638853663631. The reversal of 16638853663627 is 72636635883661.

It is a de Polignac number, because none of the positive numbers 2^k-16638853663627 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16638853663697) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3143874 + ... + 6569752.

It is an arithmetic number, because the mean of its divisors is an integer number (1123613270640).

Almost surely, 2^{16638853663627} is an apocalyptic number.

16638853663627 is a deficient number, since it is larger than the sum of its proper divisors (1338958666613).

16638853663627 is a wasteful number, since it uses less digits than its factorization.

16638853663627 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3427122.

The product of its digits is 940584960, while the sum is 70.

The spelling of 16638853663627 in words is "sixteen trillion, six hundred thirty-eight billion, eight hundred fifty-three million, six hundred sixty-three thousand, six hundred twenty-seven".