409914549991 has 2 divisors, whose sum is σ = 409914549992. Its totient is φ = 409914549990.

The previous prime is 409914549971. The next prime is 409914550061. The reversal of 409914549991 is 199945419904.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 409914549991 - 2¹¹ = 409914547943 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409914549901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204957274995 + 204957274996.

It is an arithmetic number, because the mean of its divisors is an integer number (204957274996).

Almost surely, 2^409914549991 is an apocalyptic number.

409914549991 is a deficient number, since it is larger than the sum of its proper divisors (1).

409914549991 is an equidigital number, since it uses as much as digits as its factorization.

409914549991 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18895680, while the sum is 64.

The spelling of 409914549991 in words is "four hundred nine billion, nine hundred fourteen million, five hundred forty-nine thousand, nine hundred ninety-one".