449651201980 has 96 divisors (see below), whose sum is σ = 1002743820288. Its totient is φ = 169005830400.

The previous prime is 449651201947. The next prime is 449651201981. The reversal of 449651201980 is 89102156944.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (449651201981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23083645 + ... + 23103115.

It is an arithmetic number, because the mean of its divisors is an integer number (10445248128).

Almost surely, 2^449651201980 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 449651201980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (501371910144).

449651201980 is an abundant number, since it is smaller than the sum of its proper divisors (553092618308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

449651201980 is a wasteful number, since it uses less digits than its factorization.

449651201980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20387 (or 20385 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 49.

The spelling of 449651201980 in words is "four hundred forty-nine billion, six hundred fifty-one million, two hundred one thousand, nine hundred eighty".