2216453978176 has 21 divisors (see below), whose sum is σ = 4398299497389. Its totient is φ = 1108221033984.

The previous prime is 2216453978171. The next prime is 2216453978197. The reversal of 2216453978176 is 6718793546122.

The square root of 2216453978176 is 1488776.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 1120295233600 + 1096158744576 = 1058440^2 + 1046976^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2216453978171) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 11817160 + ... + 12003256.

It is an arithmetic number, because the mean of its divisors is an integer number (209442833209).

Almost surely, 2^{2216453978176} is an apocalyptic number.

2216453978176 is the 1488776-th square number.

It is an amenable number.

2216453978176 is a deficient number, since it is larger than the sum of its proper divisors (2181845519213).

2216453978176 is an frugal number, since it uses more digits than its factorization.

2216453978176 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372206 (or 186099 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 61.

The spelling of 2216453978176 in words is "two trillion, two hundred sixteen billion, four hundred fifty-three million, nine hundred seventy-eight thousand, one hundred seventy-six".