91158582161 has 8 divisors (see below), whose sum is σ = 93494991744. Its totient is φ = 88832010960.

The previous prime is 91158582149. The next prime is 91158582167. The reversal of 91158582161 is 16128585119.

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

It is not a de Polignac number, because 91158582161 - 2³⁰ = 90084840337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91158582167) 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 7 ways as a sum of consecutive naturals, for example, 2440826 + ... + 2477891.

It is an arithmetic number, because the mean of its divisors is an integer number (11686873968).

Almost surely, 2^91158582161 is an apocalyptic number.

It is an amenable number.

91158582161 is a deficient number, since it is larger than the sum of its proper divisors (2336409583).

91158582161 is a wasteful number, since it uses less digits than its factorization.

91158582161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4919191.

The product of its digits is 172800, while the sum is 47.

The spelling of 91158582161 in words is "ninety-one billion, one hundred fifty-eight million, five hundred eighty-two thousand, one hundred sixty-one".