91044468771 has 4 divisors (see below), whose sum is σ = 121392625032. Its totient is φ = 60696312512.

The previous prime is 91044468737. The next prime is 91044468773. The reversal of 91044468771 is 17786444019.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91044468771 is a prime.

It is not an unprimeable number, because it can be changed into a prime (91044468773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15174078126 + ... + 15174078131.

It is an arithmetic number, because the mean of its divisors is an integer number (30348156258).

Almost surely, 2^91044468771 is an apocalyptic number.

91044468771 is a deficient number, since it is larger than the sum of its proper divisors (30348156261).

91044468771 is a wasteful number, since it uses less digits than its factorization.

91044468771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30348156260.

The product of its (nonzero) digits is 1354752, while the sum is 51.

The spelling of 91044468771 in words is "ninety-one billion, forty-four million, four hundred sixty-eight thousand, seven hundred seventy-one".