40186617617 has 2 divisors, whose sum is σ = 40186617618. Its totient is φ = 40186617616.

The previous prime is 40186617587. The next prime is 40186617683. The reversal of 40186617617 is 71671668104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31527198481 + 8659419136 = 177559^2 + 93056^2 .

It is a cyclic number.

It is not a de Polignac number, because 40186617617 - 2¹² = 40186613521 is a prime.

It is a super-2 number, since 2×40186617617² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40186617697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20093308808 + 20093308809.

It is an arithmetic number, because the mean of its divisors is an integer number (20093308809).

Almost surely, 2^40186617617 is an apocalyptic number.

It is an amenable number.

40186617617 is a deficient number, since it is larger than the sum of its proper divisors (1).

40186617617 is an equidigital number, since it uses as much as digits as its factorization.

40186617617 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 47.

The spelling of 40186617617 in words is "forty billion, one hundred eighty-six million, six hundred seventeen thousand, six hundred seventeen".