21601522375768 has 16 divisors (see below), whose sum is σ = 40506557229000. Its totient is φ = 10799773781376.

The previous prime is 21601522375739. The next prime is 21601522375801. The reversal of 21601522375768 is 86757322510612.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 123332833 + ... + 123507856.

Almost surely, 2^{21601522375768} is an apocalyptic number.

It is an amenable number.

21601522375768 is a deficient number, since it is larger than the sum of its proper divisors (18905034853232).

21601522375768 is a wasteful number, since it uses less digits than its factorization.

21601522375768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246851634 (or 246851630 counting only the distinct ones).

The product of its (nonzero) digits is 8467200, while the sum is 55.

The spelling of 21601522375768 in words is "twenty-one trillion, six hundred one billion, five hundred twenty-two million, three hundred seventy-five thousand, seven hundred sixty-eight".