91047675959 has 4 divisors (see below), whose sum is σ = 93165063816. Its totient is φ = 88930288104.

The previous prime is 91047675949. The next prime is 91047675989. The reversal of 91047675959 is 95957674019.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 95957674019 = 29 ⋅3308885311.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91047675959 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91047675949) 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 3 ways as a sum of consecutive naturals, for example, 1058693864 + ... + 1058693949.

It is an arithmetic number, because the mean of its divisors is an integer number (23291265954).

Almost surely, 2^91047675959 is an apocalyptic number.

91047675959 is a deficient number, since it is larger than the sum of its proper divisors (2117387857).

91047675959 is a wasteful number, since it uses less digits than its factorization.

91047675959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2117387856.

The product of its (nonzero) digits is 21432600, while the sum is 62.

The spelling of 91047675959 in words is "ninety-one billion, forty-seven million, six hundred seventy-five thousand, nine hundred fifty-nine".