501433385449 has 4 divisors (see below), whose sum is σ = 530929466964. Its totient is φ = 471937303936.

The previous prime is 501433385389. The next prime is 501433385459. The reversal of 501433385449 is 944583334105.

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 322064195049 + 179369190400 = 567507^2 + 423520^2 .

It is a cyclic number.

It is not a de Polignac number, because 501433385449 - 2¹¹ = 501433383401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501433385459) 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, 14748040732 + ... + 14748040765.

It is an arithmetic number, because the mean of its divisors is an integer number (132732366741).

Almost surely, 2^501433385449 is an apocalyptic number.

It is an amenable number.

501433385449 is a deficient number, since it is larger than the sum of its proper divisors (29496081515).

501433385449 is a wasteful number, since it uses less digits than its factorization.

501433385449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29496081514.

The product of its (nonzero) digits is 3110400, while the sum is 49.

The spelling of 501433385449 in words is "five hundred one billion, four hundred thirty-three million, three hundred eighty-five thousand, four hundred forty-nine".