40011641 has 4 divisors (see below), whose sum is σ = 40461300. Its totient is φ = 39561984.

The previous prime is 40011637. The next prime is 40011667. The reversal of 40011641 is 14611004.

40011641 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 can be written as a sum of positive squares in 2 ways, for example, as 23078416 + 16933225 = 4804^2 + 4115^2 .

It is a cyclic number.

It is not a de Polignac number, because 40011641 - 2² = 40011637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40011341) 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, 224696 + ... + 224873.

It is an arithmetic number, because the mean of its divisors is an integer number (10115325).

Almost surely, 2^40011641 is an apocalyptic number.

It is an amenable number.

40011641 is a deficient number, since it is larger than the sum of its proper divisors (449659).

40011641 is an equidigital number, since it uses as much as digits as its factorization.

40011641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 449658.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 40011641 is about 6325.4755552448. The cubic root of 40011641 is about 342.0283625008.

Adding to 40011641 its reverse (14611004), we get a palindrome (54622645).

The spelling of 40011641 in words is "forty million, eleven thousand, six hundred forty-one".