91333608541 has 4 divisors (see below), whose sum is σ = 104381266912. Its totient is φ = 78285950172.

The previous prime is 91333608539. The next prime is 91333608571. The reversal of 91333608541 is 14580633319.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 91333608541 - 2¹ = 91333608539 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 (91333608571) 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 3 ways as a sum of consecutive naturals, for example, 6523829175 + ... + 6523829188.

It is an arithmetic number, because the mean of its divisors is an integer number (26095316728).

Almost surely, 2^91333608541 is an apocalyptic number.

It is an amenable number.

91333608541 is a deficient number, since it is larger than the sum of its proper divisors (13047658371).

91333608541 is a wasteful number, since it uses less digits than its factorization.

91333608541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13047658370.

The product of its (nonzero) digits is 233280, while the sum is 43.

The spelling of 91333608541 in words is "ninety-one billion, three hundred thirty-three million, six hundred eight thousand, five hundred forty-one".