40116645 has 12 divisors (see below), whose sum is σ = 69535596. Its totient is φ = 21395520.

The previous prime is 40116641. The next prime is 40116647. The reversal of 40116645 is 54661104.

40116645 is a `hidden beast` number, since 4 + 0 + 1 + 16 + 645 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 12047841 + 28068804 = 3471^2 + 5298^2 .

It is not a de Polignac number, because 40116645 - 2² = 40116641 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40116641) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 445696 + ... + 445785.

It is an arithmetic number, because the mean of its divisors is an integer number (5794633).

Almost surely, 2^40116645 is an apocalyptic number.

40116645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40116645 is a deficient number, since it is larger than the sum of its proper divisors (29418951).

40116645 is a wasteful number, since it uses less digits than its factorization.

40116645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891492 (or 891489 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 40116645 is about 6333.7702042307. The cubic root of 40116645 is about 342.3273002924.

Adding to 40116645 its reverse (54661104), we get a palindrome (94777749).

The spelling of 40116645 in words is "forty million, one hundred sixteen thousand, six hundred forty-five".