40645911 has 8 divisors (see below), whose sum is σ = 54254464. Its totient is φ = 27067320.

The previous prime is 40645901. The next prime is 40645919. The reversal of 40645911 is 11954604.

It is a happy number.

40645911 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40645911 - 2⁷ = 40645783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40645919) 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 7 ways as a sum of consecutive naturals, for example, 4105 + ... + 9906.

It is an arithmetic number, because the mean of its divisors is an integer number (6781808).

Almost surely, 2^40645911 is an apocalyptic number.

40645911 is a deficient number, since it is larger than the sum of its proper divisors (13608553).

40645911 is a wasteful number, since it uses less digits than its factorization.

40645911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14981.

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 40645911 is about 6375.4145747551. The cubic root of 40645911 is about 343.8261893489.

The spelling of 40645911 in words is "forty million, six hundred forty-five thousand, nine hundred eleven".