1445421894049 has 27 divisors (see below), whose sum is σ = 1786310396787. Its totient is φ = 1165939220544.

The previous prime is 1445421894047. The next prime is 1445421894053. The reversal of 1445421894049 is 9404981245441.

The square root of 1445421894049 is 1202257.

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., 1125328464225 + 320093429824 = 1060815^2 + 565768^2 .

It is not a de Polignac number, because 1445421894049 - 2¹ = 1445421894047 is a prime.

It is a super-2 number, since 2×1445421894049² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1445421894047) 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 26 ways as a sum of consecutive naturals, for example, 143063532 + ... + 143073634.

Almost surely, 2^{1445421894049} is an apocalyptic number.

1445421894049 is the 1202257-th square number.

1445421894049 is the 601129-th centered octagonal number.

It is an amenable number.

1445421894049 is a deficient number, since it is larger than the sum of its proper divisors (340888502738).

1445421894049 is an frugal number, since it uses more digits than its factorization.

1445421894049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20254 (or 10127 counting only the distinct ones).

The product of its (nonzero) digits is 6635520, while the sum is 55.

The spelling of 1445421894049 in words is "one trillion, four hundred forty-five billion, four hundred twenty-one million, eight hundred ninety-four thousand, forty-nine".