91045464771 has 4 divisors (see below), whose sum is σ = 121393953032. Its totient is φ = 60696976512.

The previous prime is 91045464749. The next prime is 91045464791. The reversal of 91045464771 is 17746454019.

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

It is not a de Polignac number, because 91045464771 - 2¹⁵ = 91045432003 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91045464771.

It is not an unprimeable number, because it can be changed into a prime (91045464791) 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, 15174244126 + ... + 15174244131.

It is an arithmetic number, because the mean of its divisors is an integer number (30348488258).

Almost surely, 2^91045464771 is an apocalyptic number.

91045464771 is a deficient number, since it is larger than the sum of its proper divisors (30348488261).

91045464771 is a wasteful number, since it uses less digits than its factorization.

91045464771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30348488260.

The product of its (nonzero) digits is 846720, while the sum is 48.

The spelling of 91045464771 in words is "ninety-one billion, forty-five million, four hundred sixty-four thousand, seven hundred seventy-one".