41020000991 has 2 divisors, whose sum is σ = 41020000992. Its totient is φ = 41020000990.

The previous prime is 41020000981. The next prime is 41020001021. The reversal of 41020000991 is 19900002014.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 41020000991 - 2¹⁰ = 41019999967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 41020000991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41020000951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20510000495 + 20510000496.

It is an arithmetic number, because the mean of its divisors is an integer number (20510000496).

Almost surely, 2^41020000991 is an apocalyptic number.

41020000991 is a deficient number, since it is larger than the sum of its proper divisors (1).

41020000991 is an equidigital number, since it uses as much as digits as its factorization.

41020000991 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 26.

The spelling of 41020000991 in words is "forty-one billion, twenty million, nine hundred ninety-one", and thus it is an aban number.