445411649 has 4 divisors (see below), whose sum is σ = 445535700. Its totient is φ = 445287600.

The previous prime is 445411643. The next prime is 445411651. The reversal of 445411649 is 946114544.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 236175424 + 209236225 = 15368^2 + 14465^2 .

It is a cyclic number.

It is not a de Polignac number, because 445411649 - 2¹⁶ = 445346113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (445411643) 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, 56474 + ... + 63875.

It is an arithmetic number, because the mean of its divisors is an integer number (111383925).

Almost surely, 2^445411649 is an apocalyptic number.

It is an amenable number.

445411649 is a deficient number, since it is larger than the sum of its proper divisors (124051).

445411649 is a wasteful number, since it uses less digits than its factorization.

445411649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124050.

The product of its digits is 69120, while the sum is 38.

The square root of 445411649 is about 21104.7778713731. Note that the first 3 decimals coincide. The cubic root of 445411649 is about 763.6960136953.

The spelling of 445411649 in words is "four hundred forty-five million, four hundred eleven thousand, six hundred forty-nine".