40642163 has 4 divisors (see below), whose sum is σ = 40656720. Its totient is φ = 40627608.

The previous prime is 40642157. The next prime is 40642177. The reversal of 40642163 is 36124604.

40642163 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.

It is a cyclic number.

It is not a de Polignac number, because 40642163 - 2⁶ = 40642099 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40642183) 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, 1628 + ... + 9161.

It is an arithmetic number, because the mean of its divisors is an integer number (10164180).

Almost surely, 2^40642163 is an apocalyptic number.

40642163 is a deficient number, since it is larger than the sum of its proper divisors (14557).

40642163 is a wasteful number, since it uses less digits than its factorization.

40642163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14556.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 40642163 is about 6375.1206263097. The cubic root of 40642163 is about 343.8156208388.

Adding to 40642163 its reverse (36124604), we get a palindrome (76766767).

The spelling of 40642163 in words is "forty million, six hundred forty-two thousand, one hundred sixty-three".