21616232610556 has 12 divisors (see below), whose sum is σ = 38850796448968. Its totient is φ = 10516005053712.

The previous prime is 21616232610481. The next prime is 21616232610617. The reversal of 21616232610556 is 65501623261612.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73027812726 + ... + 73027813021.

Almost surely, 2^{21616232610556} is an apocalyptic number.

It is an amenable number.

21616232610556 is a deficient number, since it is larger than the sum of its proper divisors (17234563838412).

21616232610556 is a wasteful number, since it uses less digits than its factorization.

21616232610556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146055625788 (or 146055625786 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 46.

The spelling of 21616232610556 in words is "twenty-one trillion, six hundred sixteen billion, two hundred thirty-two million, six hundred ten thousand, five hundred fifty-six".