445323645 has 48 divisors (see below), whose sum is σ = 839612592. Its totient is φ = 217036800.

The previous prime is 445323643. The next prime is 445323679. The reversal of 445323645 is 546323544.

445323645 is a `hidden beast` number, since 4 + 4 + 5 + 3 + 2 + 3 + 645 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 29241 + 445294404 = 171^2 + 21102^2 .

It is not a de Polignac number, because 445323645 - 2¹ = 445323643 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (445323643) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55317 + ... + 62853.

It is an arithmetic number, because the mean of its divisors is an integer number (17491929).

Almost surely, 2^445323645 is an apocalyptic number.

445323645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

445323645 is a deficient number, since it is larger than the sum of its proper divisors (394288947).

445323645 is a wasteful number, since it uses less digits than its factorization.

445323645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7662 (or 7659 counting only the distinct ones).

The product of its digits is 172800, while the sum is 36.

The square root of 445323645 is about 21102.6928376452. The cubic root of 445323645 is about 763.6457136108.

The spelling of 445323645 in words is "four hundred forty-five million, three hundred twenty-three thousand, six hundred forty-five".