91276067009 has 4 divisors (see below), whose sum is σ = 91587589716. Its totient is φ = 90964544304.

The previous prime is 91276066993. The next prime is 91276067083. The reversal of 91276067009 is 90076067219.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 75540873409 + 15735193600 = 274847^2 + 125440^2 .

It is a cyclic number.

It is not a de Polignac number, because 91276067009 - 2⁴ = 91276066993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91276069009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155760914 + ... + 155761499.

It is an arithmetic number, because the mean of its divisors is an integer number (22896897429).

Almost surely, 2^91276067009 is an apocalyptic number.

It is an amenable number.

91276067009 is a deficient number, since it is larger than the sum of its proper divisors (311522707).

91276067009 is a wasteful number, since it uses less digits than its factorization.

91276067009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311522706.

The product of its (nonzero) digits is 285768, while the sum is 47.

The spelling of 91276067009 in words is "ninety-one billion, two hundred seventy-six million, sixty-seven thousand, nine".