445541565121 has 25 divisors (see below), whose sum is σ = 481491149761. Its totient is φ = 412275915828.

The previous prime is 445541565061. The next prime is 445541565173. The reversal of 445541565121 is 121565145544.

The square root of 445541565121 is 667489.

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

It is not a de Polignac number, because 445541565121 - 2⁹ = 445541564609 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445541565191) 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 24 ways as a sum of consecutive naturals, for example, 10361431726 + ... + 10361431768.

Almost surely, 2^445541565121 is an apocalyptic number.

445541565121 is the 667489-th square number.

445541565121 is the 333745-th centered octagonal number.

It is an amenable number.

445541565121 is a deficient number, since it is larger than the sum of its proper divisors (35949584640).

445541565121 is an frugal number, since it uses more digits than its factorization.

445541565121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248 (or 62 counting only the distinct ones).

The product of its digits is 480000, while the sum is 43.

The spelling of 445541565121 in words is "four hundred forty-five billion, five hundred forty-one million, five hundred sixty-five thousand, one hundred twenty-one".