11220905456644 has 27 divisors (see below), whose sum is σ = 21263448902367. Its totient is φ = 5178839244384.

The previous prime is 11220905456633. The next prime is 11220905456699. The reversal of 11220905456644 is 44665450902211.

The square root of 11220905456644 is 3349762.

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

It can be written as a sum of positive squares in 4 ways, for example, as 8704494314244 + 2516411142400 = 2950338^2 + 1586320^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 87029394 + ... + 87158230.

Almost surely, 2^{11220905456644} is an apocalyptic number.

11220905456644 is the 3349762-nd square number.

It is an amenable number.

11220905456644 is a deficient number, since it is larger than the sum of its proper divisors (10042543445723).

11220905456644 is an frugal number, since it uses more digits than its factorization.

11220905456644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257704 (or 128852 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 49.

Multiplying 11220905456644 by its sum of digits (49), we get a square (549824367375556 = 23448334²).

The spelling of 11220905456644 in words is "eleven trillion, two hundred twenty billion, nine hundred five million, four hundred fifty-six thousand, six hundred forty-four".