91091000011 has 8 divisors (see below), whose sum is σ = 99876428784. Its totient is φ = 82389642720.

The previous prime is 91091000009. The next prime is 91091000017. The reversal of 91091000011 is 11000019019.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91091000011 - 2¹ = 91091000009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91091000017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21015600 + ... + 21019933.

It is an arithmetic number, because the mean of its divisors is an integer number (12484553598).

Almost surely, 2^91091000011 is an apocalyptic number.

91091000011 is a deficient number, since it is larger than the sum of its proper divisors (8785428773).

91091000011 is a wasteful number, since it uses less digits than its factorization.

91091000011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42035741.

The product of its (nonzero) digits is 81, while the sum is 22.

It can be divided in two parts, 910910000 and 11, that multiplied together give a square (10020010000 = 100100²).

The spelling of 91091000011 in words is "ninety-one billion, ninety-one million, eleven", and thus it is an aban number and an uban number.