21688101101608 has 32 divisors (see below), whose sum is σ = 41977419932160. Its totient is φ = 10494129954240.

The previous prime is 21688101101567. The next prime is 21688101101633. The reversal of 21688101101608 is 80610110188612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25632885 + ... + 26465467.

It is an arithmetic number, because the mean of its divisors is an integer number (1311794372880).

Almost surely, 2^{21688101101608} is an apocalyptic number.

It is an amenable number.

21688101101608 is a deficient number, since it is larger than the sum of its proper divisors (20289318830552).

21688101101608 is a wasteful number, since it uses less digits than its factorization.

21688101101608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937657 (or 937653 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 43.

The spelling of 21688101101608 in words is "twenty-one trillion, six hundred eighty-eight billion, one hundred one million, one hundred one thousand, six hundred eight".