91134806819 has 16 divisors (see below), whose sum is σ = 107035603200. Its totient is φ = 75957022944.

The previous prime is 91134806809. The next prime is 91134806831. The reversal of 91134806819 is 91860843119.

It is not a de Polignac number, because 91134806819 - 2³² = 86839839523 is a prime.

It is a super-2 number, since 2×91134806819² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91134806809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 310652 + ... + 527990.

It is an arithmetic number, because the mean of its divisors is an integer number (6689725200).

Almost surely, 2^91134806819 is an apocalyptic number.

91134806819 is a deficient number, since it is larger than the sum of its proper divisors (15900796381).

91134806819 is a wasteful number, since it uses less digits than its factorization.

91134806819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219002.

The product of its (nonzero) digits is 373248, while the sum is 50.

The spelling of 91134806819 in words is "ninety-one billion, one hundred thirty-four million, eight hundred six thousand, eight hundred nineteen".