45000081 has 36 divisors (see below), whose sum is σ = 76791312. Its totient is φ = 25313904.

The previous prime is 45000077. The next prime is 45000097. The reversal of 45000081 is 18000054.

45000081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 45000081 - 2² = 45000077 is a prime.

It is a super-2 number, since 2×45000081² = 4050014580013122, which contains 22 as substring.

45000081 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 (45000031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 28786 + ... + 30308.

It is an arithmetic number, because the mean of its divisors is an integer number (2133092).

Almost surely, 2^45000081 is an apocalyptic number.

It is an amenable number.

45000081 is a deficient number, since it is larger than the sum of its proper divisors (31791231).

45000081 is a wasteful number, since it uses less digits than its factorization.

45000081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1610 (or 1600 counting only the distinct ones).

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

The square root of 45000081 is about 6708.2099698802. The cubic root of 45000081 is about 355.6895438625.

The spelling of 45000081 in words is "forty-five million, eighty-one", and thus it is an aban number and an uban number.