91134391649 has 16 divisors (see below), whose sum is σ = 104969779200. Its totient is φ = 77503292880.

The previous prime is 91134391577. The next prime is 91134391721. The reversal of 91134391649 is 94619343119.

It is an interprime number because it is at equal distance from previous prime (91134391577) and next prime (91134391721).

It is a cyclic number.

It is not a de Polignac number, because 91134391649 - 2²⁴ = 91117614433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 91134391597 and 91134391606.

It is not an unprimeable number, because it can be changed into a prime (91134394649) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8433752 + ... + 8444550.

It is an arithmetic number, because the mean of its divisors is an integer number (6560611200).

Almost surely, 2^91134391649 is an apocalyptic number.

It is an amenable number.

91134391649 is a deficient number, since it is larger than the sum of its proper divisors (13835387551).

91134391649 is a wasteful number, since it uses less digits than its factorization.

91134391649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20140.

The product of its digits is 629856, while the sum is 50.

The spelling of 91134391649 in words is "ninety-one billion, one hundred thirty-four million, three hundred ninety-one thousand, six hundred forty-nine".