449816831609 has 2 divisors, whose sum is σ = 449816831610. Its totient is φ = 449816831608.

The previous prime is 449816831603. The next prime is 449816831621. The reversal of 449816831609 is 906138618944.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 449339627584 + 477204025 = 670328^2 + 21845^2 .

It is a cyclic number.

It is not a de Polignac number, because 449816831609 - 2¹² = 449816827513 is a prime.

It is not a weakly prime, because it can be changed into another prime (449816831603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 224908415804 + 224908415805.

It is an arithmetic number, because the mean of its divisors is an integer number (224908415805).

Almost surely, 2^449816831609 is an apocalyptic number.

It is an amenable number.

449816831609 is a deficient number, since it is larger than the sum of its proper divisors (1).

449816831609 is an equidigital number, since it uses as much as digits as its factorization.

449816831609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8957952, while the sum is 59.

The spelling of 449816831609 in words is "four hundred forty-nine billion, eight hundred sixteen million, eight hundred thirty-one thousand, six hundred nine".