45081999 has 12 divisors (see below), whose sum is σ = 65179296. Its totient is φ = 30026592.

The previous prime is 45081991. The next prime is 45082013. The reversal of 45081999 is 99918054.

45081999 is a `hidden beast` number, since 450 + 8 + 199 + 9 = 666.

It is not a de Polignac number, because 45081999 - 2³ = 45081991 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45081991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13402 + ... + 16424.

It is an arithmetic number, because the mean of its divisors is an integer number (5431608).

Almost surely, 2^45081999 is an apocalyptic number.

45081999 is a deficient number, since it is larger than the sum of its proper divisors (20097297).

45081999 is a wasteful number, since it uses less digits than its factorization.

45081999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4686 (or 4683 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 45.

The square root of 45081999 is about 6714.3129953853. The cubic root of 45081999 is about 355.9052450548.

The spelling of 45081999 in words is "forty-five million, eighty-one thousand, nine hundred ninety-nine".