1445644109 has 12 divisors (see below), whose sum is σ = 1811027484. Its totient is φ = 1143805824.

The previous prime is 1445644099. The next prime is 1445644141. The reversal of 1445644109 is 9014465441.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 246961225 + 1198682884 = 15715^2 + 34622^2 .

It is not a de Polignac number, because 1445644109 - 2⁸ = 1445643853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445644159) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1134092 + ... + 1135365.

It is an arithmetic number, because the mean of its divisors is an integer number (150918957).

Almost surely, 2^1445644109 is an apocalyptic number.

It is an amenable number.

1445644109 is a deficient number, since it is larger than the sum of its proper divisors (365383375).

1445644109 is a wasteful number, since it uses less digits than its factorization.

1445644109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2269484 (or 2269477 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 38.

The square root of 1445644109 is about 38021.6268589339. The cubic root of 1445644109 is about 1130.7166751375.

The spelling of 1445644109 in words is "one billion, four hundred forty-five million, six hundred forty-four thousand, one hundred nine".