40016545 has 4 divisors (see below), whose sum is σ = 48019860. Its totient is φ = 32013232.

The previous prime is 40016507. The next prime is 40016563. The reversal of 40016545 is 54561004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 15928081 + 24088464 = 3991^2 + 4908^2 .

It is a cyclic number.

It is not a de Polignac number, because 40016545 - 2¹⁵ = 39983777 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4001650 + ... + 4001659.

It is an arithmetic number, because the mean of its divisors is an integer number (12004965).

Almost surely, 2^40016545 is an apocalyptic number.

It is an amenable number.

40016545 is a deficient number, since it is larger than the sum of its proper divisors (8003315).

40016545 is an equidigital number, since it uses as much as digits as its factorization.

40016545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8003314.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 40016545 is about 6325.8631822068. The cubic root of 40016545 is about 342.0423354224.

Adding to 40016545 its reverse (54561004), we get a palindrome (94577549).

The spelling of 40016545 in words is "forty million, sixteen thousand, five hundred forty-five".