449887591321 has 16 divisors (see below), whose sum is σ = 529640173440. Its totient is φ = 374110830720.

The previous prime is 449887591229. The next prime is 449887591381. The reversal of 449887591321 is 123195788944.

It is a cyclic number.

It is not a de Polignac number, because 449887591321 - 2⁹ = 449887590809 is a prime.

It is a super-2 number, since 2×449887591321² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 449887591321.

It is not an unprimeable number, because it can be changed into a prime (449887591381) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4327266 + ... + 4430011.

It is an arithmetic number, because the mean of its divisors is an integer number (33102510840).

Almost surely, 2^449887591321 is an apocalyptic number.

449887591321 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

449887591321 is a deficient number, since it is larger than the sum of its proper divisors (79752582119).

449887591321 is a wasteful number, since it uses less digits than its factorization.

449887591321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8757504.

The product of its digits is 17418240, while the sum is 61.

The spelling of 449887591321 in words is "four hundred forty-nine billion, eight hundred eighty-seven million, five hundred ninety-one thousand, three hundred twenty-one".