91260440220811 has 4 divisors (see below), whose sum is σ = 91719035398000. Its totient is φ = 90801845043624.

The previous prime is 91260440220787. The next prime is 91260440220893. The reversal of 91260440220811 is 11802204406219.

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

It is a cyclic number.

It is not a de Polignac number, because 91260440220811 - 2²⁹ = 91259903349899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (91260440223811) 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, 229297588296 + ... + 229297588693.

It is an arithmetic number, because the mean of its divisors is an integer number (22929758849500).

Almost surely, 2^{91260440220811} is an apocalyptic number.

91260440220811 is a deficient number, since it is larger than the sum of its proper divisors (458595177189).

91260440220811 is a wasteful number, since it uses less digits than its factorization.

91260440220811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458595177188.

The product of its (nonzero) digits is 55296, while the sum is 40.

The spelling of 91260440220811 in words is "ninety-one trillion, two hundred sixty billion, four hundred forty million, two hundred twenty thousand, eight hundred eleven".