45009681 has 4 divisors (see below), whose sum is σ = 60012912. Its totient is φ = 30006452.

The previous prime is 45009647. The next prime is 45009707. The reversal of 45009681 is 18690054.

45009681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 45009681 - 2⁶ = 45009617 is a prime.

It is a super-2 number, since 2×45009681² = 4051742767443522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45009641) 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 3 ways as a sum of consecutive naturals, for example, 7501611 + ... + 7501616.

It is an arithmetic number, because the mean of its divisors is an integer number (15003228).

Almost surely, 2^45009681 is an apocalyptic number.

It is an amenable number.

45009681 is a deficient number, since it is larger than the sum of its proper divisors (15003231).

45009681 is a wasteful number, since it uses less digits than its factorization.

45009681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15003230.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 45009681 is about 6708.9254728310. The cubic root of 45009681 is about 355.7148354972.

The spelling of 45009681 in words is "forty-five million, nine thousand, six hundred eighty-one".