40191062189 has 2 divisors, whose sum is σ = 40191062190. Its totient is φ = 40191062188.

The previous prime is 40191062179. The next prime is 40191062203. The reversal of 40191062189 is 98126019104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31273092964 + 8917969225 = 176842^2 + 94435^2 .

It is a cyclic number.

It is not a de Polignac number, because 40191062189 - 2²⁰ = 40190013613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40191062179) 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, 20095531094 + 20095531095.

It is an arithmetic number, because the mean of its divisors is an integer number (20095531095).

Almost surely, 2^40191062189 is an apocalyptic number.

It is an amenable number.

40191062189 is a deficient number, since it is larger than the sum of its proper divisors (1).

40191062189 is an equidigital number, since it uses as much as digits as its factorization.

40191062189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 41.

The spelling of 40191062189 in words is "forty billion, one hundred ninety-one million, sixty-two thousand, one hundred eighty-nine".