16638853663630 has 16 divisors (see below), whose sum is σ = 32672658103344. Its totient is φ = 6050492241280.

The previous prime is 16638853663583. The next prime is 16638853663631. The reversal of 16638853663630 is 3636635883661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16638853663631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75631152907 + ... + 75631153126.

It is an arithmetic number, because the mean of its divisors is an integer number (2042041131459).

Almost surely, 2^{16638853663630} is an apocalyptic number.

16638853663630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

16638853663630 is a deficient number, since it is larger than the sum of its proper divisors (16033804439714).

16638853663630 is a wasteful number, since it uses less digits than its factorization.

16638853663630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151262306051.

The product of its (nonzero) digits is 201553920, while the sum is 64.

The spelling of 16638853663630 in words is "sixteen trillion, six hundred thirty-eight billion, eight hundred fifty-three million, six hundred sixty-three thousand, six hundred thirty".