2216445638400 has 4320 divisors, whose sum is σ = 10952219013120. Its totient is φ = 429981696000.

The previous prime is 2216445638377. The next prime is 2216445638423. The reversal of 2216445638400 is 48365446122.

2216445638400 is a `hidden beast` number, since 2 + 2 + 1 + 6 + 4 + 4 + 5 + 638 + 4 + 0 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (2216445638377) and next prime (2216445638423).

It is a tau number, because it is divible by the number of its divisors (4320).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 479 ways as a sum of consecutive naturals, for example, 36335174370 + ... + 36335174430.

Almost surely, 2^{2216445638400} is an apocalyptic number.

2216445638400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2216445638400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5476109506560).

2216445638400 is an abundant number, since it is smaller than the sum of its proper divisors (8735773374720).

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

2216445638400 is a wasteful number, since it uses less digits than its factorization.

2216445638400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 2216445638400 in words is "two trillion, two hundred sixteen billion, four hundred forty-five million, six hundred thirty-eight thousand, four hundred".