450000081 has 24 divisors (see below), whose sum is σ = 689049504. Its totient is φ = 282019200.

The previous prime is 450000071. The next prime is 450000097. The reversal of 450000081 is 180000054.

It is not a de Polignac number, because 450000081 - 2⁶ = 450000017 is a prime.

It is a super-2 number, since 2×450000081² = 405000145800013122, which contains 22 as substring.

450000081 is a modest number, since divided by 81 gives 45 as remainder.

It is not an unprimeable number, because it can be changed into a prime (450000071) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 220990 + ... + 223016.

It is an arithmetic number, because the mean of its divisors is an integer number (28710396).

Almost surely, 2^450000081 is an apocalyptic number.

It is an amenable number.

450000081 is a deficient number, since it is larger than the sum of its proper divisors (239049423).

450000081 is a wasteful number, since it uses less digits than its factorization.

450000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3501 (or 3498 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 450000081 is about 21213.2053447846. The cubic root of 450000081 is about 766.3094783721.

The spelling of 450000081 in words is "four hundred fifty million, eighty-one", and thus it is an aban number.