45018149 has 4 divisors (see below), whose sum is σ = 49110720. Its totient is φ = 40925580.

The previous prime is 45018143. The next prime is 45018161. The reversal of 45018149 is 94181054.

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 a de Polignac number, because none of the positive numbers 2^k-45018149 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45018143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2046269 + ... + 2046290.

It is an arithmetic number, because the mean of its divisors is an integer number (12277680).

Almost surely, 2^45018149 is an apocalyptic number.

It is an amenable number.

45018149 is a deficient number, since it is larger than the sum of its proper divisors (4092571).

45018149 is a wasteful number, since it uses less digits than its factorization.

45018149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4092570.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 45018149 is about 6709.5565427232. The cubic root of 45018149 is about 355.7371418417.

The spelling of 45018149 in words is "forty-five million, eighteen thousand, one hundred forty-nine".