45649181 has 4 divisors (see below), whose sum is σ = 47633952. Its totient is φ = 43664412.

The previous prime is 45649171. The next prime is 45649189. The reversal of 45649181 is 18194654.

45649181 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 45649181 - 2¹⁰ = 45648157 is a prime.

It is a super-2 number, since 2×45649181² = 4167695451941522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45649189) 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, 992351 + ... + 992396.

It is an arithmetic number, because the mean of its divisors is an integer number (11908488).

Almost surely, 2^45649181 is an apocalyptic number.

It is an amenable number.

45649181 is a deficient number, since it is larger than the sum of its proper divisors (1984771).

45649181 is a wasteful number, since it uses less digits than its factorization.

45649181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984770.

The product of its digits is 34560, while the sum is 38.

The square root of 45649181 is about 6756.4177638746. The cubic root of 45649181 is about 357.3915911696.

The spelling of 45649181 in words is "forty-five million, six hundred forty-nine thousand, one hundred eighty-one".