2216564556020 has 48 divisors (see below), whose sum is σ = 4775571501120. Its totient is φ = 863884955136.

The previous prime is 2216564556013. The next prime is 2216564556091. The reversal of 2216564556020 is 206554656122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8178362 + ... + 8445041.

It is an arithmetic number, because the mean of its divisors is an integer number (99491072940).

Almost surely, 2^{2216564556020} is an apocalyptic number.

2216564556020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2216564556020 is an abundant number, since it is smaller than the sum of its proper divisors (2559006945100).

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

2216564556020 is a wasteful number, since it uses less digits than its factorization.

2216564556020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16623584 (or 16623582 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 44.

The spelling of 2216564556020 in words is "two trillion, two hundred sixteen billion, five hundred sixty-four million, five hundred fifty-six thousand, twenty".