12217737270544 has 45 divisors (see below), whose sum is σ = 25633230279813. Its totient is φ = 5638871774016.

The previous prime is 12217737270499. The next prime is 12217737270581. The reversal of 12217737270544 is 44507273771221.

The square root of 12217737270544 is 3495388.

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., 1807357584400 + 10410379686144 = 1344380^2 + 3226512^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 12217737270491 and 12217737270500.

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, 181726567 + ... + 181793785.

Almost surely, 2^{12217737270544} is an apocalyptic number.

12217737270544 is the 3495388-th square number.

It is an amenable number.

12217737270544 is an abundant number, since it is smaller than the sum of its proper divisors (13415493009269).

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

12217737270544 is an frugal number, since it uses more digits than its factorization.

12217737270544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134472 (or 67234 counting only the distinct ones).

The product of its (nonzero) digits is 4609920, while the sum is 52.

The spelling of 12217737270544 in words is "twelve trillion, two hundred seventeen billion, seven hundred thirty-seven million, two hundred seventy thousand, five hundred forty-four".