21616061650156 has 12 divisors (see below), whose sum is σ = 38448240804400. Its totient is φ = 10630849991760.

The previous prime is 21616061650103. The next prime is 21616061650193. The reversal of 21616061650156 is 65105616061612.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44295208056 + ... + 44295208543.

Almost surely, 2^{21616061650156} is an apocalyptic number.

It is an amenable number.

21616061650156 is a deficient number, since it is larger than the sum of its proper divisors (16832179154244).

21616061650156 is a wasteful number, since it uses less digits than its factorization.

21616061650156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88590416664 (or 88590416662 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 21616061650156 in words is "twenty-one trillion, six hundred sixteen billion, sixty-one million, six hundred fifty thousand, one hundred fifty-six".