445045091689 has 9 divisors (see below), whose sum is σ = 489189861181. Its totient is φ = 404579775820.

The previous prime is 445045091633. The next prime is 445045091753. The reversal of 445045091689 is 986190540544.

The square root of 445045091689 is 667117.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 445045091689 - 2¹¹ = 445045089641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445045095689) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7307964 + ... + 7368610.

Almost surely, 2^445045091689 is an apocalyptic number.

445045091689 is the 667117-th square number.

445045091689 is the 333559-th centered octagonal number.

It is an amenable number.

445045091689 is a deficient number, since it is larger than the sum of its proper divisors (44144769492).

445045091689 is an frugal number, since it uses more digits than its factorization.

445045091689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121316 (or 60658 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 55.

The spelling of 445045091689 in words is "four hundred forty-five billion, forty-five million, ninety-one thousand, six hundred eighty-nine".