1445444461 has 16 divisors (see below), whose sum is σ = 1498376880. Its totient is φ = 1393666560.

The previous prime is 1445444449. The next prime is 1445444467. The reversal of 1445444461 is 1644445441.

It can be written as a sum of positive squares in 8 ways, for example, as 275394025 + 1170050436 = 16595^2 + 34206^2 .

It is a cyclic number.

It is not a de Polignac number, because 1445444461 - 2⁷ = 1445444333 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1445444461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1445444467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 852931 + ... + 854623.

It is an arithmetic number, because the mean of its divisors is an integer number (93648555).

Almost surely, 2^1445444461 is an apocalyptic number.

It is an amenable number.

1445444461 is a deficient number, since it is larger than the sum of its proper divisors (52932419).

1445444461 is a wasteful number, since it uses less digits than its factorization.

1445444461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2016.

The product of its digits is 122880, while the sum is 37.

The square root of 1445444461 is about 38019.0013151319. The cubic root of 1445444461 is about 1130.6646208976.

The spelling of 1445444461 in words is "one billion, four hundred forty-five million, four hundred forty-four thousand, four hundred sixty-one".