445453740716681 has 4 divisors (see below), whose sum is σ = 445456166022672. Its totient is φ = 445451315410692.

The previous prime is 445453740716629. The next prime is 445453740716753. The reversal of 445453740716681 is 186617047354544.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 445453740716681 - 2⁶ = 445453740716617 is a prime.

It is a super-2 number, since 2×445453740716681² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (445453740719681) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1212377471 + ... + 1212744836.

It is an arithmetic number, because the mean of its divisors is an integer number (111364041505668).

Almost surely, 2^{445453740716681} is an apocalyptic number.

It is an amenable number.

445453740716681 is a deficient number, since it is larger than the sum of its proper divisors (2425305991).

445453740716681 is a wasteful number, since it uses less digits than its factorization.

445453740716681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2425305990.

The product of its (nonzero) digits is 270950400, while the sum is 65.

The spelling of 445453740716681 in words is "four hundred forty-five trillion, four hundred fifty-three billion, seven hundred forty million, seven hundred sixteen thousand, six hundred eighty-one".