21652560615066 has 16 divisors (see below), whose sum is σ = 43307873221824. Its totient is φ = 7217061539744.

The previous prime is 21652560615041. The next prime is 21652560615071. The reversal of 21652560615066 is 66051606525612.

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, 114564030 + ... + 114752873.

It is an arithmetic number, because the mean of its divisors is an integer number (2706742076364).

Almost surely, 2^{21652560615066} is an apocalyptic number.

21652560615066 is an abundant number, since it is smaller than the sum of its proper divisors (21655312606758).

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

21652560615066 is a wasteful number, since it uses less digits than its factorization.

21652560615066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229332645.

The product of its (nonzero) digits is 3888000, while the sum is 51.

The spelling of 21652560615066 in words is "twenty-one trillion, six hundred fifty-two billion, five hundred sixty million, six hundred fifteen thousand, sixty-six".