40291209991 has 2 divisors, whose sum is σ = 40291209992. Its totient is φ = 40291209990.

The previous prime is 40291209961. The next prime is 40291210021. The reversal of 40291209991 is 19990219204.

It is a balanced prime because it is at equal distance from previous prime (40291209961) and next prime (40291210021).

It is a cyclic number.

It is not a de Polignac number, because 40291209991 - 2⁷ = 40291209863 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40291209911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20145604995 + 20145604996.

It is an arithmetic number, because the mean of its divisors is an integer number (20145604996).

Almost surely, 2^40291209991 is an apocalyptic number.

40291209991 is a deficient number, since it is larger than the sum of its proper divisors (1).

40291209991 is an equidigital number, since it uses as much as digits as its factorization.

40291209991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 46.

The spelling of 40291209991 in words is "forty billion, two hundred ninety-one million, two hundred nine thousand, nine hundred ninety-one".