45178945 has 16 divisors (see below), whose sum is σ = 65605248. Its totient is φ = 29157120.

The previous prime is 45178943. The next prime is 45178963. The reversal of 45178945 is 54987154.

It is not a de Polignac number, because 45178945 - 2¹ = 45178943 is a prime.

It is a super-2 number, since 2×45178945² = 4082274142626050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45178943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37371 + ... + 38560.

It is an arithmetic number, because the mean of its divisors is an integer number (4100328).

Almost surely, 2^45178945 is an apocalyptic number.

It is an amenable number.

45178945 is a deficient number, since it is larger than the sum of its proper divisors (20426303).

45178945 is a wasteful number, since it uses less digits than its factorization.

45178945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75960.

The product of its digits is 201600, while the sum is 43.

The square root of 45178945 is about 6721.5284720069. The cubic root of 45178945 is about 356.1601796744.

The spelling of 45178945 in words is "forty-five million, one hundred seventy-eight thousand, nine hundred forty-five".