91144159073 has 24 divisors (see below), whose sum is σ = 103706803200. Its totient is φ = 79947917280.

The previous prime is 91144159049. The next prime is 91144159079. The reversal of 91144159073 is 37095144119.

It is a happy number.

It is not a de Polignac number, because 91144159073 - 2³² = 86849191777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91144159079) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5827658 + ... + 5843276.

It is an arithmetic number, because the mean of its divisors is an integer number (4321116800).

Almost surely, 2^91144159073 is an apocalyptic number.

It is an amenable number.

91144159073 is a deficient number, since it is larger than the sum of its proper divisors (12562644127).

91144159073 is a wasteful number, since it uses less digits than its factorization.

91144159073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333 (or 17322 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 91144159073 in words is "ninety-one billion, one hundred forty-four million, one hundred fifty-nine thousand, seventy-three".