40091611 has 16 divisors (see below), whose sum is σ = 47084544. Its totient is φ = 33424704.

The previous prime is 40091591. The next prime is 40091629. The reversal of 40091611 is 11619004.

It is a cyclic number.

It is not a de Polignac number, because 40091611 - 2¹⁷ = 39960539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40091671) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76396 + ... + 76918.

It is an arithmetic number, because the mean of its divisors is an integer number (2942784).

Almost surely, 2^40091611 is an apocalyptic number.

40091611 is a deficient number, since it is larger than the sum of its proper divisors (6992933).

40091611 is a wasteful number, since it uses less digits than its factorization.

40091611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 810.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 40091611 is about 6331.7936637259. The cubic root of 40091611 is about 342.2560779451.

The spelling of 40091611 in words is "forty million, ninety-one thousand, six hundred eleven".