445453760078021 has 24 divisors (see below), whose sum is σ = 461793911748000. Its totient is φ = 429673853568960.

The previous prime is 445453760078009. The next prime is 445453760078087. The reversal of 445453760078021 is 120870067354544.

It is a happy number.

It is not a de Polignac number, because 445453760078021 - 2¹⁸ = 445453759815877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445453762078021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9945583895 + ... + 9945628683.

It is an arithmetic number, because the mean of its divisors is an integer number (19241412989500).

Almost surely, 2^{445453760078021} is an apocalyptic number.

It is an amenable number.

445453760078021 is a deficient number, since it is larger than the sum of its proper divisors (16340151669979).

445453760078021 is a wasteful number, since it uses less digits than its factorization.

445453760078021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56117 (or 56088 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 56.

The spelling of 445453760078021 in words is "four hundred forty-five trillion, four hundred fifty-three billion, seven hundred sixty million, seventy-eight thousand, twenty-one".