1443221011656 has 96 divisors (see below), whose sum is σ = 4014745113600. Its totient is φ = 468027331200.

The previous prime is 1443221011633. The next prime is 1443221011709. The reversal of 1443221011656 is 6561101223441.

1443221011656 is a `hidden beast` number, since 1 + 4 + 432 + 210 + 1 + 1 + 6 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1443221011656.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39544825 + ... + 39581303.

It is an arithmetic number, because the mean of its divisors is an integer number (41820261600).

Almost surely, 2^{1443221011656} is an apocalyptic number.

It is an amenable number.

1443221011656 is an abundant number, since it is smaller than the sum of its proper divisors (2571524101944).

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

1443221011656 is a wasteful number, since it uses less digits than its factorization.

1443221011656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51379 (or 51372 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The spelling of 1443221011656 in words is "one trillion, four hundred forty-three billion, two hundred twenty-one million, eleven thousand, six hundred fifty-six".