910001000991 has 16 divisors (see below), whose sum is σ = 1218535418880. Its totient is φ = 604067476320.

The previous prime is 910001000981. The next prime is 910001001023. The reversal of 910001000991 is 199000100019.

It is not a de Polignac number, because 910001000991 - 2⁶ = 910001000927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (910001000921) 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 in 15 ways as a sum of consecutive naturals, for example, 7620541 + ... + 7739033.

It is an arithmetic number, because the mean of its divisors is an integer number (76158463680).

Almost surely, 2^910001000991 is an apocalyptic number.

910001000991 is a deficient number, since it is larger than the sum of its proper divisors (308534417889).

910001000991 is a wasteful number, since it uses less digits than its factorization.

910001000991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129446.

The product of its (nonzero) digits is 729, while the sum is 30.

The spelling of 910001000991 in words is "nine hundred ten billion, one million, nine hundred ninety-one", and thus it is an aban number.