1445222656 has 72 divisors (see below), whose sum is σ = 3041410680. Its totient is φ = 684343296.

The previous prime is 1445222651. The next prime is 1445222699. The reversal of 1445222656 is 6562225441.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 92160000 + 1353062656 = 9600^2 + 36784^2 .

It is not an unprimeable number, because it can be changed into a prime (1445222651) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 391636 + ... + 395308.

It is an arithmetic number, because the mean of its divisors is an integer number (42241815).

Almost surely, 2^1445222656 is an apocalyptic number.

1445222656 is a gapful number since it is divisible by the number (16) 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 1445222656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1520705340).

1445222656 is an abundant number, since it is smaller than the sum of its proper divisors (1596188024).

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

1445222656 is an equidigital number, since it uses as much as digits as its factorization.

1445222656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3771 (or 3757 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 1445222656 is about 38016.0841749910. The cubic root of 1445222656 is about 1130.6067840403.

The spelling of 1445222656 in words is "one billion, four hundred forty-five million, two hundred twenty-two thousand, six hundred fifty-six".