40061791 has 16 divisors (see below), whose sum is σ = 52121088. Its totient is φ = 29858400.

The previous prime is 40061773. The next prime is 40061803. The reversal of 40061791 is 19716004.

It is not a de Polignac number, because 40061791 - 2⁵ = 40061759 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 (40061701) 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, 9540 + ... + 13081.

It is an arithmetic number, because the mean of its divisors is an integer number (3257568).

Almost surely, 2^40061791 is an apocalyptic number.

40061791 is a deficient number, since it is larger than the sum of its proper divisors (12059297).

40061791 is a wasteful number, since it uses less digits than its factorization.

40061791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22662.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 40061791 is about 6329.4384427056. The cubic root of 40061791 is about 342.1712006067.

Adding to 40061791 its reverse (19716004), we get a palindrome (59777795).

The spelling of 40061791 in words is "forty million, sixty-one thousand, seven hundred ninety-one".