16638853663628 has 24 divisors (see below), whose sum is σ = 33277883557632. Its totient is φ = 7130899520784.

The previous prime is 16638853663583. The next prime is 16638853663631. The reversal of 16638853663628 is 82636635883661.

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, 4176875 + ... + 7122077.

It is an arithmetic number, because the mean of its divisors is an integer number (1386578481568).

Almost surely, 2^{16638853663628} is an apocalyptic number.

It is an amenable number.

16638853663628 is an abundant number, since it is smaller than the sum of its proper divisors (16639029894004).

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

16638853663628 is a wasteful number, since it uses less digits than its factorization.

16638853663628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3146981 (or 3146979 counting only the distinct ones).

The product of its digits is 1074954240, while the sum is 71.

The spelling of 16638853663628 in words is "sixteen trillion, six hundred thirty-eight billion, eight hundred fifty-three million, six hundred sixty-three thousand, six hundred twenty-eight".