91226406782 has 16 divisors (see below), whose sum is σ = 156410142720. Its totient is φ = 39091527288.

The previous prime is 91226406781. The next prime is 91226406809. The reversal of 91226406782 is 28760462219.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91226406781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 354878 + ... + 555329.

It is an arithmetic number, because the mean of its divisors is an integer number (9775633920).

Almost surely, 2^91226406782 is an apocalyptic number.

91226406782 is a deficient number, since it is larger than the sum of its proper divisors (65183735938).

91226406782 is a wasteful number, since it uses less digits than its factorization.

91226406782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 917375.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 91226406782 in words is "ninety-one billion, two hundred twenty-six million, four hundred six thousand, seven hundred eighty-two".